Walking up and down stairs without pain in the knee may be due to osteoarthritis, chondromalacia patella, synovitis, osteophytes and other pathologic factors, usually cannot be self-healing. 1. Osteoarthritis: the patella in the stairs up and down the pressure is relatively greater, it is easy to produce pain, osteoarthritis will continue to develop as the body ages, usually can not be self-healing, but can be slowed down the degeneration of timely intervention. 2. Chondromalacia patellae: patients with chondromalacia patellae will also experience increased pain when walking up and down stairs, which needs to be treated under the guidance of a doctor in a timely manner in order to prevent more serious injuries. 3. Synovitis: Patients with synovitis may also suffer from pain due to excessive pressure on stairs, which can be relieved by physiotherapy and medication. 4. Osteomalacia: Osteomalacia can irritate the soft tissues around the knee joint and cause pain. Osteomalacia is not self-healing, and serious symptoms require timely surgical treatment. Caused by walking up and down the stairs knee pain walking pain causes more, but most of the disease usually can not be self-healing, the need for timely intervention, to control the progress of the disease, if walking up and down the stairs knee pain walking pain symptoms persist, it is recommended to seek medical attention to identify the cause of the disease, targeted treatment.