Leg muscle pain may be caused by excessive exercise, or it may be caused by lumbar disc herniation, varicose veins of the lower extremities, thromboembolic vasculitis and other diseases. 1. Excessive exercise: such as walking and standing for a long time, which can lead to excessive fatigue of the leg muscles and produce a kind of aseptic, fatigue and strain inflammation, resulting in soreness of the leg muscles. 2. Lumbar disc herniation: it is one of the more common disorders, which is mainly manifested as lumbar pain, radiating pain in the lower limbs, numbness in the lower limbs and other symptoms. 3. Varicose veins of the lower limbs: refers to the expansion of the flexion of the veins of the lower limbs. There are no obvious symptoms in the early stage, and the typical symptoms are twisted veins in the legs and protruding from the body surface, which can be accompanied by lower limb pain, numbness, itching, edema and lower limb hyperpigmentation. 4. Thromboembolic vasculitis: it is a chronic, occlusive inflammatory disease of peripheral blood vessels, which occurs in the blood vessels of lower limbs. The main manifestations are leg pain, numbness of the feet, coldness, pale skin color and other symptoms. There are many other causes of leg muscle pain, and you should consult a doctor in time to identify the cause of the disease and follow the doctor’s instructions for further treatment or therapy.