Knee pain after standing for a long time may be due to the increased pressure on the articular cartilage caused by standing for a long time, which can be relieved by rest, local warmth, functional exercise and medication. 1.Rest: should pay attention to appropriate rest, avoid long time standing and walking, can effectively reduce the pressure on the articular cartilage of the knee joint, reduce the load of wear and tear, proper protection of the joints, and improve the symptoms of knee pain. 2. Warmth: attention should be paid to the warmth of the knee, i.e. the knee joint area, which is conducive to the recovery of knee pain, and avoid the knee joint being stimulated by the temperature, resulting in pain. 3. Functional exercise: you can take the initiative to carry out functional exercise, such as jogging, cycling, supine elevation of the knee joint, empty pedal bicycle and other sports, to enhance the strength of the quadriceps muscles around the knee joint and the strength of the joints, which can improve the stability of the knee joint and relieve the symptoms. 4. Medication: If the knee pain is more obvious, you can take oral non-steroidal anti-inflammatory drugs, such as ibuprofen, diclofenac sodium, etc., which is conducive to relieving the symptoms of knee pain. It is recommended to use medication under the guidance of a doctor, not blindly self-medication to avoid adverse effects.