After calf muscle atrophy, the first symptom is the thinning of the calf, that is, when comparing the two sides of the calf, the atrophied side will be significantly thinner. In addition, muscle weakness in the calf area may occur, especially when moving down to the ground with weight, there will be obvious weakness in the calf, and there will be obvious soreness and swelling in the muscles on the back of the calf after activity, and when pressing and touching the calf muscles, there will be obvious muscle relaxation in the calf area. When the ankle joint is flexed and extended and squatting activities are performed, the muscles of the calf area will feel obviously wrinkled and stiff, and after a day of activities, there will be obvious edema in the ankle joint area and obvious soreness and swelling of the muscles on the back side of the calf.