Sore legs and fatigue and feeling tired can be related to prolonged activity, colds and fevers, and conditions such as herniated discs in the lumbar spine. For people who are physically weak or often do not exercise, if they stand for a long time or carry out intense activities, their muscles are in a state of fatigue, which can cause symptoms of sore legs and fatigue. If the body temperature rises due to colds, bacterial or viral infections, the muscles in the legs consume a lot of energy and lactic acid builds up, which can also cause symptoms such as fatigue and tiredness. Lumbar disc herniation, spinal stenosis and other causes of compression of the spinal cord and nerve roots can cause abnormalities in the innervation function of the lower limbs, and symptoms such as weakness and soreness of the legs can also occur. Vascular lesions in the lower limbs, such as varicose veins and venous thrombosis, which cause obstruction of venous return, can also cause the above symptoms. If the symptoms of legs pain and tiredness occur, it is recommended that the patient go to the hospital for medical treatment to clarify the cause of the disease and carry out regular treatment.