Professional guidance is needed when starting functional ankle exercises. There may be some pain or discomfort at the beginning of the exercise. If you feel more pain, stop the functional exercise and take a short rest. Ice should be applied to the ankle joint for 15 minutes after functional exercise, do not put ice directly on the skin. Functional exercise of the ankle joint is usually performed 3 times a day. 1. Writing Move the ankle and foot and write each letter of the alphabet on the floor. Keep the lower leg straight and do not straighten the knee and ankle joints. The letter starts small and becomes larger as ankle function improves. 2. Ankle flexion and extension exercises Move the foot up and down as if depressing or easing the clutch on the car. Repeat 10 times. 3.Ankle lateral movement Move the foot from side to side and repeat 10 times. 4.Ankle rotation movement Rotate the foot, clockwise first and then counterclockwise, repeat 10 times. 5.Stretch the ankle joint Sit and straighten your leg, circle the foot with a towel, pull backward, pull until the muscle has a tense feeling, not pain, and then relax. Each time to maintain this tense state for 20 to 25 seconds, repeat this exercise 3 times a day. 6, toe flexion exercise Put a towel on the floor in front of you, sit yourself on a stool, put your feet on the towel, flex your toes to grab the towel under the arch, do not move your heel during the exercise, repeat 10 times.