Knee pain walking up stairs without pain can be caused by ligament inflammation, meniscus injury or osteoarthritis, etc., which can be treated by meniscus repair, use of ibuprofen and other drugs, physical therapy, and so on. 1. Ligament inflammation: joint injury or chronic strain injury caused by long-term overwork can cause inflammation of knee ligaments, patients with knee joint swelling and pain, pressure pain and other symptoms, pain aggravated by stairs. Can through the celecoxib and other drugs anti-inflammatory pain, or the use of local microwave physiotherapy and other treatment. 2. Meniscus injury: violent rotation of the knee or long-term extrusion by gravity can cause meniscus injury of the knee joint, resulting in pain and swelling, joint popping and other symptoms, and pain is obvious when going up the stairs. It can be treated by immobilization such as plaster or meniscus repair. 3. Osteoarthritis: Osteoarthritis can be caused by factors such as aging and overweight, resulting in symptoms such as joint pain, stiffness, swelling and obvious pain when walking up stairs. It can be treated with anti-inflammatory drugs such as ibuprofen to relieve pain, or by surgery such as knee replacement. Knee pain when walking up stairs without pain can also be caused by other factors, patients should go to the hospital for the appropriate examination in order to find out the specific causes of the disease, and get effective treatment. Consult your doctor in advance about how to use the medication.