How effective is physiotherapy for Baker's cyst?

A Baker's cyst is a fluid-filled swelling behind the knee, often associated with irritation inside the joint such as arthritis or a meniscus problem. Physiotherapy may reduce stress on the knee by improving thigh and hip strength, restoring comfortable movement and teaching ways to manage squatting, stairs or prolonged standing. Treatment is directed at function and the underlying knee mechanics; it is not a guaranteed way to empty the cyst. Your clinician may also consider examination or imaging when the cause is unclear.

A physiotherapist can assess the knee, walking pattern, range of movement and activity triggers. Follow a graded strengthening and mobility plan, and use relative rest from movements that sharply increase swelling. Ice or elevation may be suggested for comfort when appropriate. Do not massage a painful lump forcefully or increase exercise simply to make the swelling disappear. If the knee remains swollen, catches, locks or cannot straighten, arrange a review to assess the joint as well as the cyst.

Seek urgent medical assessment for sudden calf swelling, warmth, redness or pain, especially with breathlessness or chest pain, because a ruptured cyst can resemble a blood clot and serious causes must be excluded. Arrange routine review for persistent swelling, increasing pain, fever, a locked knee or new difficulty bearing weight.

What is irritating the knee joint? Is physiotherapy appropriate before further testing? Which activities should I modify? What calf or breathing symptoms require urgent assessment?