Knee Pain Explained: Understanding & Treating Baker’s Cyst

October 5, 2025

Knee pain is one of the most common musculoskeletal complaints we see at Weaver Physiotherapy & Sports Injury Clinic in Northwich, Cheshire. From runners and athletes to office workers and retirees, knee problems can affect anyone. While many people are familiar with conditions such as arthritis, meniscus tears, or ligament injuries, one often-overlooked cause of knee swelling and discomfort is a Baker’s Cyst.


Also known as a popliteal cyst, this condition can cause swelling behind the knee, stiffness, and reduced mobility – and if untreated, it may lead to ongoing pain or limit your ability to exercise, walk comfortably, or perform daily activities.


In this in-depth guide, we’ll explain what a Baker’s Cyst is, the symptoms to look out for, why it develops, and most importantly – how physiotherapy can help you manage, treat, and prevent it.


What is a Baker’s Cyst?


A Baker’s Cyst is a fluid-filled swelling that develops behind the knee, in the popliteal space. It occurs when excess joint fluid (synovial fluid) escapes from the knee joint and collects in a small sac behind the knee.


This fluid build-up is often a result of an underlying knee problem, such as:

    •    Osteoarthritis (wear and tear of the knee joint)

    •    Rheumatoid arthritis

    •    Meniscus injuries (cartilage tears)

    •    Ligament injuries

    •    Knee joint inflammation


The cyst itself is not dangerous, but it can be painful, restrict movement, and cause the back of the knee to feel tight – especially when bending or straightening the leg.


Symptoms of a Baker’s Cyst


Some people with a Baker’s Cyst may not experience symptoms at all, especially if the cyst is small. However, when symptoms do occur, they may include:


✔️ A noticeable lump or swelling behind the knee

✔️ Tightness or stiffness in the back of the knee

✔️ Pain or aching, particularly when straightening or bending the leg

✔️ Reduced flexibility and mobility

✔️ Swelling in the calf (if the cyst bursts and fluid leaks down the leg)


In rare cases, a ruptured Baker’s Cyst can mimic the symptoms of a blood clot (deep vein thrombosis – DVT), with sudden calf swelling, pain, and redness. If you experience these symptoms, urgent medical assessment is required.


Causes: Why Do Baker’s Cysts Develop?


A Baker’s Cyst does not develop in isolation – it usually results from knee joint changes or injury that causes excess fluid production. Common causes include:


1. Arthritis

    •    Osteoarthritis is a major cause. As the cartilage wears down, the joint becomes inflamed, leading to fluid build-up.

    •    Rheumatoid arthritis, an autoimmune condition, can also trigger joint swelling and cyst formation.


2. Sports Injuries

    •    Damage to the meniscus (cartilage) can irritate the joint and lead to cysts.

    •    Ligament injuries (ACL, MCL) may also increase fluid build-up.


3. Overuse or Repetitive Strain

    •    Runners, cyclists, and people who frequently squat or kneel may place repetitive stress on the knee joint, contributing to cyst formation.


4. Underlying Inflammation

    •    Any condition that causes inflammation within the knee joint (including gout) can lead to synovial fluid leakage and cyst development.


Diagnosis of a Baker’s Cyst


At Weaver Physiotherapy & Sports Injury Clinic, our Chartered Physiotherapists carry out a detailed assessment to identify whether your knee pain and swelling are caused by a Baker’s Cyst, or another condition.


The process may include:


🔹 Clinical assessment – checking your symptoms, medical history, and examining the back of the knee for swelling.

🔹 Ultrasound scan – often recommended to confirm the diagnosis.

🔹 MRI scan – if an underlying injury such as a cartilage tear is suspected.


Early diagnosis is key. Many patients believe they just have “knee swelling” without realising it’s linked to an underlying joint issue.


How Physiotherapy Helps Baker’s Cyst


Physiotherapy is one of the most effective ways to manage and treat a Baker’s Cyst. While draining the cyst or surgery is sometimes required in severe cases, the majority of patients benefit from conservative treatment that targets the root cause.


At Weaver Physio, our approach focuses on:


1. Pain Relief & Swelling Reduction

    •    Manual therapy to ease stiffness

    •    Ice, compression, and elevation strategies

    •    Advice on activity modification to avoid aggravation


2. Improving Knee Mobility

    •    Gentle stretching exercises to restore range of movement

    •    Targeted flexibility work for the hamstrings and calf muscles


3. Strengthening Exercises

    •    Quadriceps strengthening to improve joint support

    •    Glute activation to reduce stress on the knee

    •    Core stability to enhance overall lower-limb mechanics


4. Correcting Biomechanics

    •    Video Gait Analysis and biomechanical assessment (part of our Runner’s MOT service)

    •    Identifying imbalances in walking or running that may contribute to knee overload


5. Treating the Underlying Cause

    •    If arthritis is the cause, we’ll develop a long-term joint management plan

    •    If it’s due to a sports injury, we’ll provide a tailored rehabilitation programme


Home Management Strategies


Alongside professional physiotherapy, patients can often manage symptoms at home with:


✔️ Rest & Activity Modification – avoiding deep squats or repetitive knee strain

✔️ Ice Therapy – applying ice packs to reduce swelling

✔️ Compression Supports – knee braces can help control fluid build-up

✔️ Gentle Exercises – as advised by your physiotherapist


When is Surgery Needed?


Surgery is rarely the first option for Baker’s Cyst. It is usually only considered if:

    •    The cyst is very large and painful

    •    Conservative treatments have failed

    •    The underlying cause (such as a meniscus tear) requires surgical repair


In such cases, a surgeon may drain the cyst (aspiration) or repair the damaged structures inside the knee.


Can a Baker’s Cyst Burst?


Yes. In some cases, the cyst can rupture, releasing fluid into the calf. This can cause sudden pain, swelling, and bruising in the lower leg. It may resemble a DVT (blood clot), so it’s important to seek urgent medical advice to rule this out.


Recovery Timeline


Recovery depends on the underlying cause:

    •    Minor cases: Symptoms may improve in a few weeks with rest and physiotherapy.

    •    Arthritis-related cases: Long-term management is required, but physiotherapy helps control pain and mobility.

    •    Sports injuries: Recovery may take 6–12 weeks, depending on the severity of the meniscus or ligament damage.


At Weaver Physio, we’ll give you a personalised recovery plan so you know exactly what to expect at each stage.


Preventing Baker’s Cyst


While not all cases can be prevented, you can reduce your risk by:


🔹 Maintaining strong quadriceps, hamstrings, and glutes

🔹 Avoiding repetitive high-impact activities without proper recovery

🔹 Wearing appropriate footwear for your activity

🔹 Seeking physiotherapy early if you experience knee swelling or stiffness


Why Choose Weaver Physio for Knee Pain?


At Weaver Physiotherapy & Sports Injury Clinic in Northwich, Cheshire, we are specialists in diagnosing and treating knee injuries and conditions such as Baker’s Cyst.


Here’s why patients across Cheshire – including Northwich, Knutsford, Winsford, Middlewich, Tarporley, and Frodsham – choose us:


✔️ 70+ years of combined clinical experience

✔️ Experts in sports injuries, arthritis, and musculoskeletal pain

✔️ Access to advanced services such as Shockwave Therapy, Acupuncture & Video Gait Analysis

✔️ Tailored rehabilitation plans that get to the root cause of your pain

✔️ Trusted by runners, athletes, and the local community


Our goal is simple: to help you recover faster, prevent future injuries, and get back to living pain-free.


Book Your Appointment


If you’re struggling with knee pain or suspect you may have a Baker’s Cyst, don’t ignore the symptoms. Early treatment can make a huge difference in your recovery and long-term knee health.


📞 Call us today on 01606 227484

🌐 Visit us at http://www.weaverphysio.com


Weaver Physiotherapy & Sports Injury Clinic – Your Trusted Partner in Recovery, Performance & Pain-Free Living.


By M NORMAN • October 8, 2026
A Practical Guide for Endurance Runners
October 7, 2026
Have you ever been told that your running style is “wrong” and immediately wondered whether you need to change it? Advice online can make normal differences in movement look like faults. While certain running habits may be worth exploring—particularly when pain keeps returning—there is no single perfect stride, cadence or foot strike for every runner. At Weaver Physiotherapy & Sports Injury Clinic, we take an individual approach to running technique. Your training history, symptoms, strength, mobility, goals and the way you respond to load all matter. For runners in Northwich, Middlewich, Winsford, Knutsford, Sandbach, Frodsham and Tarporley, our Runner’s MOT and running gait analysis⁠ provides clear, personalised feedback rather than generic rules. What are common running form mistakes? A “running form mistake” is often better described as a movement habit to investigate. A pattern may look unusual without being harmful, and a video alone cannot confirm that it is the cause of pain. Common concerns include: Overstriding – the foot appearing to land well ahead of the body. Upper-body tension – raised shoulders, clenched hands, a tight jaw or stiff arm swing. Forcing foot strike – deliberately trying to run on the forefoot or heel when it feels awkward. Slumped posture – losing trunk control as fatigue develops. Abrupt changes in technique – trying to alter cadence, posture and foot strike at the same time. These patterns can change with pace, hills, footwear, fatigue, confidence and training load. Research has found limited evidence that individual biomechanics alone predict running injury, which is why form should be considered alongside the wider picture rather than treated as a diagnosis. Is there one correct way to run? No. Effective running does not look identical from person to person. Your anatomy, strength, experience, speed, terrain and fatigue level all influence your stride. A single photograph or short clip captures only one moment. It cannot explain how you feel during a run, what your training has involved that week, or whether a movement pattern is actually contributing to symptoms. If you are comfortable, progressing well and free from persistent pain, you may not need to change your technique simply because it differs from someone else’s. The aim is not to chase a “perfect” running style. It is to understand your own movement and make sensible adjustments only when they are relevant to your goals or symptoms. How to assess your running form safely Start with one question. Perhaps your foot feels as though it reaches too far forwards, your shoulders tighten on longer runs, or you notice discomfort appearing as you fatigue. During an easy run at your usual pace, consider: Does your breathing feel relaxed? Are your shoulders, hands and jaw unnecessarily tense? Does your stride feel comfortable and natural? Does your movement alter later in the run? Is there recurring pain during, after or the following day? If you use video, record a brief clip from a safe, consistent position beside the route or on a treadmill. Never hold or watch a phone while running. Footage can be useful for observation, but it should prompt questions—not provide a self-diagnosis. How to change running technique without overdoing it Avoid making dramatic changes based on a social-media tip or a one-size-fits-all rule. A sudden change in cadence, posture or foot strike may feel unnatural and can make it difficult to work out what is helping. Instead: Choose one area to explore. Use one simple cue during an easy run. Keep the adjustment gentle and brief. Notice how it feels during the run and over the next 24–48 hours. Do not introduce several technique changes at once. For example, if you feel tense through the upper body, a helpful cue may be “soft shoulders and easy arms” rather than forcing a rigid posture. If you are concerned about stride length, focus on a light, comfortable rhythm rather than trying to land in a prescribed position. Training progression matters too. Increasing distance, pace, hills and frequency too quickly can overload tissues, regardless of how your running looks. NHS advice recommends building running gradually and listening to pain rather than pushing through it. Read the NHS guide to common running injuries ⁠. When should you seek individual running advice? Consider a running assessment if pain: Keeps returning or becomes more severe Changes the way you run Persists after reducing or adapting training Is associated with swelling, weakness, limping or a loss of confidence Leaves you unsure which changes, if any, are appropriate Sudden severe pain, inability to bear weight, major swelling, numbness, deformity or a suspected serious injury should be assessed urgently. NHS guidance on sprains and strains explains when to seek urgent help. What can running gait analysis help with? A running gait analysis does not promise to predict injury or reveal one universal correction. It can, however, provide a clearer view of movement patterns in the context of your symptoms, training and goals. At Weaver Physio, our Runner’s MOT (/runners-mot)⁠ combines slow-motion video gait analysis with strength, mobility and movement assessment. We look at factors such as: Running rhythm and lower-limb control Trunk, hip, knee and foot movement Strength, balance and mobility Previous injuries and current symptoms Training volume, recovery and running goals Your findings are then used to create practical, personalised recommendations. This may include a gradual gait cue, running-specific strength work, mobility exercises, load-management advice or a structured return-to-running plan. Our Chartered Physiotherapists and Sports Rehabilitators bring more than 70 years of combined clinical experience to help runners move with greater understanding and confidence. Build a stronger, more confident running stride Running form is not a test you have to pass. A movement pattern may be worth exploring, but it does not automatically mean that something is wrong. Pay attention to comfort, recurring symptoms and changes that develop with fatigue. Make adjustments gradually, progress training sensibly and seek individual support if pain continues. For runners across Northwich and Cheshire, Weaver Physio’s running gait analysis service (/runners-mot)⁠ offers professional, tailored guidance to help you run stronger and with more confidence. Frequently Asked Questions Is there one correct running form for everyone? No. There is no single ideal foot strike, cadence or posture that applies to every runner. Comfortable, efficient running can look different depending on the individual, their pace, experience and physical characteristics. Can changing my running form cause pain? It can. Sudden or uncomfortable changes may increase stress in unfamiliar areas. Make one gradual change at a time and reduce or stop if pain worsens. How can I tell if I overstride? Overstriding may appear as the foot landing well ahead of your body, but this does not automatically mean it is causing a problem. A short video can provide useful context, while a gait assessment can help interpret the pattern alongside your symptoms and training. When should I book a running gait analysis? Book an assessment if pain is recurring, your running style has changed, you are returning from injury, or you would like clearer guidance about your stride and training. Weaver Physio supports runners from Northwich, Middlewich, Winsford, Knutsford, Sandbach, Frodsham, Tarporley and across Cheshire.
September 23, 2026
Expert Joint Care
September 21, 2026
Persistent pain at the back of the heel can make simple things—walking the dog, climbing stairs, training for the Knutsford 10K or enjoying a run around Tatton Park—feel far more difficult than they should. At Weaver Physiotherapy & Sports Injury Clinic, we provide shockwave therapy ⁠ as part of a structured rehabilitation programme for people with persistent Achilles tendon pain. Our Northwich clinic is easily accessible from Knutsford and supports active adults, runners and sportspeople across Cheshire. The goal is not simply to settle symptoms for a few days. It is to understand why the tendon is painful, improve its capacity for load, and help you return to the activities that matter to you with greater confidence. Achilles Tendinitis or Achilles Tendinopathy? “Achilles tendonitis” is the term most people use when describing pain, stiffness or swelling around the tendon at the back of the ankle. However, when symptoms have persisted for several weeks or months, the more accurate clinical term is often Achilles tendinopathy. Tendinopathy is a complex condition associated with tendon pain, reduced function and lower tolerance to exercise or repeated loading. The tendon may become more sensitive and less able to cope with the demands being placed upon it. It is not always a straightforward inflammatory problem, which is why complete rest, stretching or massage alone may not create a lasting solution. A detailed review of tendinopathy research describes the changes that can occur within painful tendons and the importance of an individualised management approach. Common symptoms include: Pain or stiffness at the back of the heel, especially first thing in the morning Discomfort when walking uphill, climbing stairs or rising onto tiptoes Pain during or after running, football, tennis, gym training or long walks Thickening or tenderness in the tendon Symptoms that improve as you warm up, then return later At Weaver Physio, we assess whether your symptoms are likely to be related to mid-portion or insertional Achilles tendinopathy, and screen for other possible causes of heel and calf pain. If there is concern about a rupture, significant tear or another condition requiring medical investigation, we will advise on the appropriate next step. What Is Shockwave Therapy? Extracorporeal Shockwave Therapy—often shortened to ESWT or radial shockwave therapy—uses controlled acoustic pressure waves delivered through a handheld applicator. It is not an electric shock and does not involve injections or surgery. During treatment, gel is applied to the skin and the handpiece is positioned over the relevant area of the Achilles tendon. The sensation is commonly described as firm tapping or pulsing. Your clinician can adjust the treatment intensity to keep it manageable. Shockwave therapy may be considered for longer-standing tendon pain, particularly where a well-planned rehabilitation programme has not yet delivered the progress you need. It should always be used following a thorough assessment and alongside progressive exercise—not as a standalone “quick fix”. How Shockwave Therapy May Help Achilles Pain Shockwave therapy is thought to influence pain sensitivity and stimulate biological responses within the tendon and surrounding tissues. The practical aim is to create a window in which you can move more comfortably and build strength more effectively. For Achilles tendinopathy, a comprehensive treatment plan may help you to: Reduce pain that is limiting walking, work or sport Improve confidence with daily activity and exercise Progress calf-strength and tendon-loading exercises more successfully Address training errors, footwear issues and movement factors contributing to overload Build resilience for a return to running, sport or long-distance walking Outcomes vary between individuals. Some people notice a change in symptoms early in treatment, while tendon adaptation and improvements in load tolerance typically take longer. We will always discuss realistic expectations and measure your progress against your own goals. Your Shockwave Therapy Assessment Near Knutsford Your journey starts with a detailed physiotherapy assessment. We look beyond the painful spot to understand the full picture, including: Your symptom history and training or activity levels Previous injuries and treatment Calf strength, ankle mobility and balance Achilles tendon tenderness and loading tolerance Footwear, running surface and recent changes in training volume Hip, knee and foot control where relevant This allows us to confirm whether shockwave therapy is an appropriate option and develop a recovery plan tailored to you. Weaver Physio’s team also provides specialist physiotherapy and sports injury rehabilitation ⁠, so your treatment can be integrated with hands-on care, exercise rehabilitation and return-to-sport planning where needed. What Does a Typical Course Involve? A course of shockwave therapy commonly involves three to five sessions, often spaced about one week apart. The exact number and timing will depend on your presentation, response to treatment and rehabilitation goals. Each appointment is combined with guidance on tendon loading. This may include: Isometric calf exercises for pain management Progressive heel raises and heavy slow resistance work Soleus and gastrocnemius strengthening Balance, control and single-leg stability work A gradual return to running, hills, speed work or plyometric exercise Rather than avoiding all activity, we help you find an appropriate level of movement that keeps the tendon challenged without repeatedly exceeding its current capacity. Is Shockwave Therapy Right for You? Shockwave therapy may be suitable if you have persistent Achilles symptoms that have not settled with sensible activity modification and a targeted rehabilitation programme. It is particularly relevant for people who want a non-invasive option before considering more invasive interventions. However, it is not suitable for everyone. Your physiotherapist will discuss relevant precautions and assess factors such as pregnancy, blood-clotting issues, certain medications, recent steroid injection near the treatment area, suspected rupture or other medical considerations. It is also important to seek urgent medical advice if you experience a sudden pop in the back of the ankle, immediate weakness when pushing off, marked bruising or an inability to rise onto your toes. These can be warning signs of an Achilles rupture. Why Choose Weaver Physio? Weaver Physiotherapy & Sports Injury Clinic combines clinical assessment with a practical understanding of sport, training and everyday activity. We are based in Northwich and regularly support patients travelling from Knutsford, Alderley Edge, Holmes Chapel, Middlewich and across Cheshire. Our approach is built around three principles: Accurate assessment We identify the likely driver of your Achilles pain rather than treating every heel problem the same way. Evidence-informed rehabilitation Shockwave therapy is used as one part of a clear, progressive plan designed to restore strength and confidence. A return to the life you enjoy Whether your goal is pain-free dog walks, a hiking holiday, club running or competitive sport, your programme is shaped around it. Book an Achilles Tendon Assessment Persistent Achilles pain does not have to dictate how active you can be. If you are looking for shockwave therapy for Achilles tendinitis in Knutsford, Weaver Physio can help you understand your options and build a tailored recovery plan. Contact Weaver Physiotherapy & Sports Injury Clinic to arrange an assessment: Book or contact Weaver Physio 01606 227 484 07795 908 027 110 Middlewich Road, Northwich, CW9 7DP Frequently Asked Questions Is shockwave therapy painful? Most people describe shockwave therapy as uncomfortable rather than painful. The feeling is similar to firm tapping against the skin, and the intensity can be adjusted throughout treatment. Mild soreness, redness or tenderness can occur afterwards and usually settles within a few days. How many sessions will I need? Many patients have a course of three to five sessions, usually one week apart. Your clinician will recommend an appropriate plan based on your symptoms, tendon presentation and response to treatment. Can I exercise after shockwave therapy? Light daily activity is usually encouraged, but your clinician may advise avoiding high-impact exercise—such as running, jumping or hard hill work—for a short period after treatment. You will be given clear guidance on what to continue, reduce and progress. Will shockwave therapy cure my Achilles pain? No treatment can guarantee a cure. Shockwave therapy may help reduce pain and support recovery in suitable cases, but lasting improvement usually depends on combining treatment with a progressive loading programme, sensible activity management and a gradual return to sport.
September 16, 2026
A Complete Guide to Recovery and Better Running
September 16, 2026
A Non-Invasive Approach to Chronic Tendon Pain
September 15, 2026
Expert Physiotherapy for Nerve Pain, Back Pain and Lasting Recovery
September 10, 2026
Expert Treatment for Recovery, Mobility & Performance
September 9, 2026
Expert Physiotherapy for Vertigo, Dizziness & Balance Problems
September 7, 2026
The Expert Runner’s MOT
Show More