Knee flexion and extension creaking may be physiological popping, may also be trauma, arthritis and other pathological factors.
1. Physiological popping: part of the population in the flexion and extension of the joints extrusion of intra-articular fluid, caused by the impact of intra-articular fluid and the surrounding tissues issued by the creaking sound, the patient is generally no discomfort symptoms, for physiological popping.
2. Trauma: Commonly caused by collision, fall and other external violence leading to knee meniscus, ligament and other tissue damage, knee flexion, extension, activity induced meniscus produce popping, patients can appear creaking sound.
3. arthritis: common in rheumatism, rheumatoid arthritis and degenerative changes lead to osteoarthritis, patients with articular cartilage surface inflammation, degeneration, hyperplasia, in the knee flexion and extension of the cartilage bone friction between each other lead to creaking.
Knee flexion and extension of the creaking sound may also be caused by other reasons, it is recommended that patients go to the hospital in time to consult the doctor to clarify the cause of the disease for targeted treatment or therapy.