Knee fossa is popliteal fossa, popliteal fossa bulge common causes such as popliteal cyst, soft tissue injury, lipoma and other causes.
1. Popliteal cyst: the deep bursa of popliteal fossa is enlarged or the synovial bursa of knee joint expands backward, which causes pain and swelling at the back of the knee, and an elastic soft tissue mass can be touched.
2. Soft tissue injury: If the soft tissue at popliteal fossa is injured due to external factors, popliteal fossa swelling will also occur, mostly accompanied by pain.
3. Lipoma: it is a common benign soft tissue tumor, which can appear in any part of the body, can be located in the subcutaneous, also can be seen in the deep part of the body. If it appears in the popliteal fossa, the appearance of the popliteal fossa can be seen as a bulging up of the popliteal fossa.
Popliteal fossa bulging may have other reasons, if you find popliteal fossa bulging, you need to go to the hospital, by the doctor to give a professional diagnosis and targeted treatment, so as not to delay the condition.