Elderly people who feel tremors in the muscles of the legs may be caused by hypoglycemia, Parkinson’s disease, lumbar disc herniation and so on. 1. Hypoglycemia: It is a group of diseases caused by various etiological factors characterized by low intravenous plasma glucose concentration, sympathetic nerve excitation and hypoxia of brain cells. It can be caused by drugs, malnutrition, heart failure, etc. Sweating, trembling of limbs, slow speech and other symptoms appear. 2. Parkinson’s disease: a common neurodegenerative disease, common in the elderly. The occurrence of this disease may be related to heredity, environment, aging and other factors. It may be characterized by tremors in the legs, which are often combined with tremors in other limbs, or symptoms such as slowness of movement and depressed mood. 3. Lumbar intervertebral disc herniation: After the various parts of the lumbar intervertebral discs show different degrees of degenerative changes, the fibrous ring of the intervertebral disc ruptures under the action of external factors, the nucleus pulposus protrudes and presses the neighboring spinal nerve roots in the spinal canal. It may cause radiating pain in the lower back and lower limbs, weakness and trembling of the legs. Elderly patients who experience muscle tremors in their legs need to go to the hospital for appropriate examinations to clarify the causes of the symptoms and follow the physician’s advice for treatment.