Knee joint swelling rarely comes alone
Sometimes patients feel a small, sometimes larger, bump in the back of the knee without any noticeable previous disease or injury. This is a so-called Baker’s cyst. The protrusion is palpably filled with fluid, but often does not cause any discomfort. Only when the swelling presses on nerves and vessels can it lead to pain and complications. Baker’s cyst is not a disease in itself, but a symptom that indicates the presence of other diseases or tissue weaknesses. The increased production of synovial fluid in the knee creates a bulge in the joint capsule, which fills with the natural synovial fluid.
A Baker’s cyst that has developed is treated symptomatically and, up to a limited size, can be alleviated with rest, pain medication, and physical therapy (physiotherapy), provided that good preventive care is subsequently taken. Permanent healing of Baker’s cyst, on the other hand, requires surgical removal.