6. Popliteal Cyst

A Popliteal Cyst, also known as a Baker’s Cyst, is a fluid-filled swelling that causes a lump at the back of the knee, leading to tightness and restricted movement. The cyst can be painful when you bend or extend your knee. Popliteal cysts are usually caused by underlying medical conditions such as gout (increased levels of uric acid in the blood), hemophilia, lupus, osteoarthritis, psoriasis, rheumatoid arthritis, and injury.

Signs and symptoms of a popliteal cyst may include knee pain, swelling or lump behind the knee, calf pain, and clicking or locking of the knee joint. Treating the underlying cause of the Baker’s cyst usually causes resolution of the cyst. General measures used to treat a popliteal cyst may include rest, ice, anti-inflammatory medications, crutches, and compression bandages. Popliteal cysts that are particularly problematic may need treatment with steroid injection, physical therapy, or knee surgery.