There are many causes of walking knee thumping, which may be normal physiological thumping, degenerative osteoarthritis, intra-articular free radicals and so on. 1. Physiological ringing: walking knee thumping, no pain and other symptoms of discomfort, belong to the normal physiological ringing of the knee joint, will not cause damage to the function of the knee joint. 2. Degenerative osteoarthritis: Walking knee thumping is caused by degenerative osteoarthritis. Symptoms such as joint pain, joint rattling and restricted movement usually occur when walking. This disease is more common in middle-aged and old people. 3. Intra-articular free body: Free body is formed by the shedding of cartilage in the joint. When walking, it will produce joint rattling sound, also accompanied by joint interlocking, and in serious cases, it will destroy the joint cartilage, causing severe pain in the joints. Walking knee thump thump thump thump thump, we recommend that the patient timely hospitalization, clear causes, symptomatic treatment, to avoid further aggravation of the condition.