Complications

Rarely, a Baker's cyst bursts and synovial fluid leaks into the calf region, causing:

• Sharp pain in your knee
• Swelling in the calf
• Sometimes, redness of your calf or a feeling of water running down your calf

These signs and symptoms closely resemble those of a blood clot in a vein in your leg. If you have swelling and redness of your calf, you'll need prompt medical evaluation to rule out a more serious cause of your symptoms.