Patients with thigh muscle atrophy may exhibit the following symptoms: First, they may exhibit slender lower extremities, and once the muscles of the thighs have atrophied, it will cause the circumference of the thighs to become very thin. If the patient has this condition on one side of the thigh, it will also show the unequal thickness of the lower limbs bilaterally. Second, it may lead to a significant weakening of the muscle strength of the lower limbs, if the patient has severe atrophy of the thigh muscles, in the process of walking will make the patient often have the phenomenon of weak legs, that is, walking, suddenly feel the knee joint is very weak, to kneel down. In addition to this, patients may also feel very weak when climbing stairs. Third, it may lead to a significant decrease in the patient’s motor ability. Muscle atrophy in this part of the thigh will lead to weakness in standing, walking, running and jumping, which in turn will lead to a significant decrease in the patient’s motor ability. At this time, if the patient carries out relevant physical exercise, will feel more obvious. Fourth, there may be easy fatigue, if there is thigh muscle atrophy, will lead to patients in doing some normal activities, such as walking slowly, climbing stairs, relatively easy to produce fatigue.