Right leg stomach tendon pain may be caused by physiological factors, such as localized cold, etc. It may also be caused by pathological factors, such as lumbar intervertebral disc herniation, tendonitis and other diseases. 1. Localized cold: If the calf is exposed to low temperature for a long time, it may cause vascular spasm and strong contraction of the calf muscle, triggering the right leg stomach tendon pain. 2. Lumbar disc herniation: If the lumbar disc is herniated, the nerve root on one side is compressed and stimulated, which may cause radiating pain in the lower limbs, accompanied by numbness and weakness of the lower limbs and other symptoms. Therefore, patients with lumbar disc herniation may have pain in the stomach of the right leg. 3. Tendonitis: If excessive exercise or heavy physical labor causes repeated pulling of the tendons in the legs, tendonitis may be induced, which in turn leads to tense muscle contraction and manifests hamstring pain. In addition to the above reasons, trauma, bone and joint degeneration may also cause pain in the leg, if it is difficult to relieve the right hamstring pain, it is recommended to go to a regular hospital in a timely manner, under the guidance of a professional doctor to find out the cause of the disease for treatment.