Walking too much knee discomfort may be caused by meniscus injury, knee synovitis and other diseases. 1. Meniscus injury: Walking a lot of knee discomfort may be caused by excessive walking, resulting in cumulative strain on the knee joint, which causes meniscus injury. When the meniscus is damaged, walking will cause pain, joint swelling, joint popping and other uncomfortable symptoms. 2. Knee synovitis: Walking too much can also cause synovial membrane damage, causing synovial inflammation, which leads to knee discomfort. Synovitis can cause increased exudate in the joints, forming joint cavity fluid, resulting in pain, swelling and other discomfort symptoms in the knee when walking. There are many reasons for knee discomfort after walking, it is recommended to go to the hospital in time, after a clear diagnosis for standardized treatment, so as not to delay the condition.