Running leg pain may be caused by certain physiological reasons, such as lactic acid buildup, etc. It is also a symptom of certain diseases, such as muscle ligament strain, lumbar disc herniation, etc. It is recommended to treat accordingly according to the cause. 1. Physiological reasons: When lactic acid builds up in the legs after high-intensity exercise, it will lead to leg pain. Massage and hot compresses can be used to improve blood circulation in the legs and relieve leg pain. 2. Muscle ligament strains: muscle strains are mainly treated conservatively, with sufficient rest at an early stage, cold compresses to reduce edema, and hot compresses to improve blood circulation after 72 hours. Drugs such as ibuprofen extended-release tablets and diclofenac sodium can be used to reduce pain and inflammation. 3. Lumbar disc herniation: If there is no obvious spinal stenosis, bed rest is recommended. If the pain is unbearable, non-steroidal anti-inflammatory drugs such as ibuprofen can be used for anti-inflammatory and analgesic purposes. Severe cases need to be treated surgically according to the situation, such as minimally invasive nucleus pulposus removal, etc., to relieve nerve root compression and relieve symptoms. In addition to this, diseases such as pyriformis syndrome and leg tumors can also cause running leg pain. If running leg pain cannot be relieved on its own, you should consult a doctor in time, who will identify the cause and then carry out specific treatment.