Whether or not an eighty year old bedridden person will suffer from muscle atrophy needs to be determined on an individual basis. If the old man is bedridden for a long time and does not exercise, he is prone to muscle atrophy. Muscle atrophy includes neurogenic muscle atrophy, myogenic muscle atrophy, and wasting muscle atrophy. Neurogenic muscular atrophy may occur if there is a history of spinal cord lesions. Myogenic muscle atrophy may occur if there is a history of myotonic dystrophy, polymyositis, or other diseases. Upper motor neuron pathology may occur if there is prolonged bed rest and prolonged muscle immobilization, which can lead to muscle atrophy. Other diseases such as malignant diseases and sympathetic muscular dystrophy can also cause muscle atrophy. Long-term bedridden without exercise, especially the elderly, are prone to develop wasting muscle atrophy. It is recommended that the elderly should not stay in bed for a long period of time. If the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.