Muscle pain in the elderly may be caused by myofasciitis, upper respiratory tract infection, lumbar disc herniation and other reasons, as follows: 1. Myofasciitis: the elderly due to overwork, cold and other reasons, excessive accumulation of lactic acid in the muscle caused by inflammation of the stimulus, resulting in the emergence of myofasciitis, which can be manifested as muscle pain and swelling of the symptoms. 2. Upper respiratory tract infection: After the occurrence of upper respiratory tract infection, due to the decline in their own immunity or fever for a long time, the inflammatory mediators released by viral infections damage the body, and muscle pain, joint pain and other symptoms. 3. Lumbar intervertebral disc herniation: Lumbar intervertebral disc herniation develops to a certain degree, in addition to the spasm and pain in the lumbar muscles, it can also cause radiating pain and numbness in the innervated areas of the lower limbs. Elderly people who have frequent muscle pain are advised to go to the hospital, clarify the specific cause of the disease and standardize the treatment under the guidance of the doctor.