Muscle atrophy can cause a lot of inconvenience to people’s lives, the essence of which is the thinning or even disappearance of muscle fibers. The causes of muscle atrophy can be broadly divided into two categories: 1. neurogenic muscle atrophy, due to neurological disorders that cause malnutrition or signal transmission disorders in the muscles, resulting in muscle weakness. 2, myogenic muscle atrophy, because the muscle itself has a disease, resulting in muscle atrophy. Usually neurogenic muscle atrophy is more common. Muscle atrophy is often manifested as muscle weakness and muscle reduction. In mild cases, patients have difficulty moving their limbs and often fall, accompanied by pain and stiffness of the muscles. Muscle dystrophy may extend to the bones, causing osteoporosis. It causes inconvenience to the patient’s daily life. In severe cases, there is a possibility of total paralysis or even life-threatening. However, most of the wasted muscles can be restored to function, so muscle atrophy should be taken seriously and treated as soon as it is detected. In clinical practice, electromyography (EMG) or nerve conduction velocity is often used for localized and qualitative diagnosis of the disease. The results are remarkable. So muscle atrophy is essentially a reduction in muscle, but muscle reduction is not necessarily muscle atrophy, it may just be a lack of movement. It is recommended that people take the symptoms of muscle weakness seriously and seek medical attention as soon as possible.