A popliteal cyst, also known as a Baker’s cyst, is a fluid-filled swelling that develops at the back of the knee and can sometimes cause knee pain. While often painless, it can become uncomfortable depending on its size and the underlying condition causing it. These cysts are commonly linked to issues such as arthritis, injury, or inflammation within the knee joint.
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Anatomy
The knee joint is formed where the thighbone (femur) meets the shinbone (tibia). These bones are covered with smooth articular cartilage, allowing them to glide easily during movement. This surface is lubricated by synovial fluid, which is produced by the joint lining (synovial membrane) and contained within the joint capsule.
A popliteal cyst develops when excess synovial fluid builds up inside the joint and pushes outward through the back of the joint capsule. This forms a small, fluid-filled sac in the popliteal fossa, the hollow area behind the knee. Many people can feel this soft swelling at the back of their knee.
Causes
Popliteal cysts often arise due to increased fluid production within the knee joint. This typically happens in response to underlying conditions such as osteoarthritis, rheumatoid arthritis, gout, or knee injuries.
Damage to the joint capsule can create a weak spot, allowing fluid to bulge outward, much like a tire forming a bubble at a weakened area. Repetitive strain or trauma to the knee can also contribute to cyst formation.
Although these cysts may resemble a blood clot, they are not related—though proper evaluation is important to rule out more serious conditions.
Symptoms
Symptoms are often mild but may include:
Aching or tightness behind the knee
A feeling of instability or weakness
Pain related to the underlying knee condition
A visible or palpable lump at the back of the knee
The size of the cyst may change over time, often increasing with activity and decreasing with rest.
In some cases, the cyst may rupture, causing fluid to leak into the calf. This can lead to swelling and pain that may mimic symptoms of a blood clot, making prompt medical evaluation important.
Diagnosis
Diagnosis usually begins with a detailed history and physical examination. In many cases, this is enough to identify the cyst.
If further evaluation is needed, imaging tests may be used:
MRI scans provide detailed images of soft tissues and can confirm the presence of a cyst
Ultrasound helps determine whether the swelling is fluid-filled or solid
X-rays are typically used to assess underlying joint conditions rather than the cyst itself.
Treatment
Treatment depends on the severity of symptoms and the underlying cause. Most cases are managed without surgery.
Nonsurgical Treatment:
Rest and elevation to reduce swelling
Aspiration (draining the fluid) followed by cortisone injection
Physical therapy to improve knee strength and flexibility
Compression, massage, and electrical stimulation to manage swelling
Managing the underlying condition—such as arthritis or injury—is essential to prevent recurrence.
Surgical Treatment:
If conservative care is not effective, surgery may be considered. The procedure involves removing the cyst and repairing the joint capsule where the fluid escaped. However, recurrence is possible, and surgery is typically reserved for persistent or severe cases.
Rehabilitation
Nonsurgical Rehabilitation:
Recovery may take two to four weeks, depending on how well the underlying condition improves. Therapy may include:
Ultrasound and electrical stimulation
Soft tissue massage
Strengthening and flexibility exercises
Iontophoresis for targeted anti-inflammatory treatment
Controlling joint swelling is key to preventing the cyst from enlarging again.
After Surgery:
After surgical removal, most people can return to daily activities gradually. We recommend:
Keeping the leg elevated to reduce swelling
Using crutches or a cane temporarily if needed
Avoiding strenuous activity for several weeks
Participating in physical therapy to restore strength and mobility
Follow-up care is important to monitor healing and reduce the risk of recurrence. Our goal is to support a safe recovery, restore function, and help you return to normal movement as efficiently as possible.
Our osteopathy services in Mississauga focuses on hands on care to restore movement, reduce pain, and improve physical function. Each session includes a full assessment of posture, mobility, and injury history to guide precise treatment. Care targets joint restriction, muscle tension, and circulation limits to support faster recovery and daily comfort. Services support injury recovery, chronic pain relief, postural correction, and long term physical balance.
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Hip pain and knee injury affect walking, sitting, and daily movement. Osteopathy focuses on joint mobility, muscle balance, and movement control to reduce strain and support long term function.
Infants/Children and Youth Injuries
Infants, children, and youth injuries affect movement, posture, and development. Osteopathy focuses on gentle hands on care to address tissue tension, joint restriction, and movement imbalance for healthy growth and function.
Migraines and headaches disrupt focus, sleep, and daily function. Osteopathy focuses on reducing tension, improving circulation, and restoring movement balance to support consistent relief and long term comfort.
Pregnancy places increased demand on the body, affecting posture, joints, and movement. Osteopathy offers gentle hands on care to support comfort, mobility, and physical balance throughout maternity.
Upper and Lower Back Pain Injury
Upper and lower back pain injury affects movement, posture, and daily activity. Osteopathy focuses on joint mobility, tissue tension, and movement balance to reduce strain and restore functional comfort.
Shoulder pain injury limits arm movement and daily tasks. Osteopathy addresses joint restriction, tissue tension, and movement imbalance to restore mobility and support stable shoulder function.
Neck pain injuries restrict movement and strain daily activity. Osteopathy focuses on joint mobility, muscle tension, and movement balance to support comfort and functional stability.
Women pelvic health wellness requires clear guidance and focused care. At Mississauga Osteopathy Clinic, you receive structured osteopathic support designed to improve pelvic function, movement, and daily comfort.
Our Mississauga osteopathy clinic offers Craniosacral Therapy, a gentle hands-on approach that supports natural movement of the skull and sacrum. Using light touch, your osteopath helps release restrictions, improve nervous system balance, and enhance overall body function.
About City Of Mississauga Ontario
Mississauga, Ontario, is a thriving city located along the shores of Lake Ontario, just west of Toronto. As one of Canada’s largest and fastest-growing cities, it is home to a diverse and multicultural population. With Pearson International Airport, the country’s busiest airport, and major corporate headquarters, Mississauga has established itself as a key business and economic hub in Canada. The city’s modern skyline, featuring high-rise condominiums and commercial developments, is complemented by green spaces, waterfront parks, and vibrant cultural attractions.
One of Mississauga’s most notable landmarks is Square One Shopping Centre, one of the largest malls in Canada, attracting millions of visitors each year. The downtown core is rapidly evolving, with new residential and commercial projects reshaping the city’s landscape. Meanwhile, neighborhoods like Port Credit offer a charming, lakefront lifestyle with boutique shops, cafes, and marinas, making it a popular destination for both residents and tourists. Historic Streetsville, with its small-town charm, provides a glimpse into Mississauga’s past while offering modern amenities.
Mississauga is also a city committed to education and innovation, with top-rated schools, colleges, and easy access to leading universities in the Greater Toronto Area. The city’s public transit system is expanding, with new LRT and GO Transit projects aiming to enhance connectivity and reduce congestion. With a strong focus on community development and sustainability, Mississauga continues to improve its infrastructure, recreational spaces, and public services to meet the needs of its growing population.
Beyond its economic success, Mississauga is a welcoming and family-friendly city with a strong sense of community. The city hosts numerous cultural festivals, outdoor events, and recreational activities, celebrating its diverse population. Whether enjoying waterfront trails in Lakeview, exploring Erin Mills and Meadowvale’s parks, or experiencing arts and performances at the Living Arts Centre, Mississauga offers something for everyone. With its blend of urban convenience and suburban comfort, it remains a top choice for those looking to live, work, and thrive in a dynamic and inclusive environment.
Major Street Intersections
- Hurontario St
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- Matheson Blvd
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Postal Codes
Central Mississauga
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North Mississauga
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References
Cleveland Clinic. (2025, July 9). Baker cyst (popliteal cyst). Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/15183-bakers-cyst
Mayo Clinic Staff. (2022, September 27). Baker cyst: Symptoms & causes. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/bakers-cyst/symptoms-causes/syc-20369950
American Academy of Orthopaedic Surgeons. (n.d.). Baker’s cyst (popliteal cyst). OrthoInfo. https://orthoinfo.aaos.org/en/diseases–conditions/bakers-cyst-popliteal-cyst/
Ontario Association of Osteopathic Manual Practitioners. (n.d.). About osteopathy. https://osteopathyontario.org/site/about/osteopathy
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