The legs are getting thinner and thinner may be the result of reduced leg exercise, malnutrition, and lesions of the muscles themselves. 1. Reduced leg movement: reduced leg movement, reduced muscle activity, over time will lead to wasting atrophy, resulting in thinner and thinner legs. Mostly seen in bedridden patients, but also may be unilateral limb or bilateral limb injury after the low activity of patients, need to actively exercise exercise. 2. Malnutrition: In the case of malnutrition, the patient will slowly break down the body fat and muscle into energy, leading to weight loss, thus making the legs thinner and thinner. Patients need to change their dietary habits to ensure balanced, adequate and comprehensive nutrition. 3. Muscle lesions: the legs are getting thinner and thinner, may also be due to muscle lesions caused by their own, generally due to the nerve center lesions or spinal cord lesions caused by the need to go to the hospital in a timely manner to consult a doctor to clarify the cause of the targeted treatment under the guidance of the doctor. The legs are getting thinner and thinner, must pay attention to, timely standardized treatment, so as not to delay the condition.