Knee pain after climbing is due to acute aseptic inflammation after repeated wear and tear of the cartilage due to overuse of the knee in a short period of time, which can be treated by the following methods: 1. rest and avoid strenuous exercise or activity. 2. do not continue to climb the stairs and try to take the elevator. 3. ice packs should be applied in a timely manner, using ice packs or ice cubes for 30 minutes each time, 4-6 times a day. 4. Elevate the affected limb appropriately to avoid swelling and promote venous reflux in the affected limb. 5. Take appropriate oral anti-inflammatory and analgesic medications, such as celecoxib, ereciclib, diclofenac sodium, etc.