Knee joint tightness is commonly caused by the following reasons: first, injury to the meniscus of the knee joint, the meniscus flips into the intercondylar fossa of the femur, limiting knee flexion and extension activities, and the muscles around the knee joint become reactive muscle tension, causing the knee joint to be in a tight state. Secondly, in acute attacks of gouty arthritis, serum uric acid forms crystals in the joint, which stimulates the synovial membrane of the knee joint and causes severe pain in the knee joint, and the knee joint is passively kept in a straight position to relieve the pain, resulting in a tight knee joint. Oral colchicine, non-steroidal anti-inflammatory pain medications, such as Ankangxin and Goutin, can promote the inflammatory response to subside and uric acid excretion, which can relieve knee pain and tightness.