Lower extremity muscle pain is caused by many reasons: first of all, overwork can cause muscle pain in the lower extremities, such as prolonged heavy labor or strenuous sports, can cause lactic acid accumulation in the muscle soft tissues, thus causing muscle pain in the lower extremities; secondly, patients with lumbar disc herniation are also prone to muscle pain in the lower extremities, because the lumbar disc herniation of the patients with the herniated discs can compress the sciatic nerve, thus causing sciatica, patients in addition to the symptoms of low back pain, but also radiating pain; again, viral infections and other reasons can also cause muscle pain symptoms. Sciatic nerve, thus causing sciatica, patients in addition to the symptoms of lumbar pain, but also can appear lower extremity radiating pain; again viral infections and other reasons can cause muscle pain symptoms, such as suffering from viral colds in addition to the symptoms of the general cold, but also muscle pain, limb fatigue and other systemic symptoms; lastly, suffering from phlebitis, varicose veins due to the poor venous return in the lower extremities, can also cause muscle swelling, pain and pain in the lower extremities. Finally, patients with phlebitis and varicose veins can also suffer from muscle swelling and pain in the lower limbs due to poor venous return. Therefore, we should pay attention to rest and avoid exertion, in addition, we can use anti-inflammatory and pain relieving drugs for symptomatic treatment. If the symptoms can not be relieved, it is also necessary to go to the hospital for further examination to clarify the cause of the disease.