Weakness in the limbs of the elderly is often caused by the following reasons: First, weakness in the limbs of the elderly is often due to lesions of the peripheral nervous system, common causes include diabetic peripheral neuropathy, pharmacogenic peripheral neuropathy, or toxic peripheral neuropathy. Secondly, the weakness of the limbs of the elderly is often caused by the unsatisfactory control of underlying diseases and chronic diseases, such as hypertension, diabetes, hyperlipidemia, etc. These underlying diseases and chronic diseases are not well controlled, and the elderly usually feel the symptoms of dizziness and weakness of the limbs. In addition, due to chronic diseases, age-related muscle reduction, namely sarcopenia, is also a common cause of limb weakness in the elderly. Third, the elderly suffer from acute diseases, such as pneumonia, peptic ulcer, gastrointestinal tumor, anemia, renal insufficiency, malnutrition, etc. These conditions may also cause weakness in the limbs of the elderly.