Ankle sprains are the most common injury in the emergency room, accounting for 85% of all ankle injuries. Ankle sprains have a deleterious effect on the proprioception and muscle strength of the ankle ligaments, causing significant pain and swelling. Mild ankle sprains that are not treated properly may cause chronic pain in the ankle joint and are prone to recurrent sprains. Severe ankle sprains do not heal well without proper treatment and rehabilitation, and the ankle may lose some range of motion and stability, with dysfunction affecting work. In contact sports, it is highly likely to cause chronic ankle instability. It is important to accurately determine the extent of the injury and provide appropriate treatment in order for the patient to recover. Therefore, it is very necessary for ankle sprain patients to know some relevant knowledge, and pay special attention to rehabilitation exercises during the treatment process, and planned rehabilitation exercises are closely related to the therapeutic effect. In addition, it is specially reminded that if the symptoms do not improve in 2 to 4 weeks during the treatment process, the patient must see a physician or specialist. Key points in the treatment of ankle sprains include control of the acute inflammatory process, restoration of normal ankle joint motion, and increase in muscle strength and power and proprioceptive capacity. These goals are obtained through different physical therapies, flexibility training, strength training and balance training. First step of treatment: the aim is to reduce pain and swelling and prevent further ligament damage. The classic RICE treatment program is generally used: rest-rest, ice-ice, compression-compression bandage, elevation-elevation of the affected limb. ①rest-rest and elevation-elevate the affected limb: elevate the ankle above the hip for the first 24 hours, while seated, and as comfortably as possible. Avoid any events that increase swelling, such as hot baths, hot water bags, or heat massage. ②compression-compression bandage: To minimize swelling, compress the ankle with an elastic jacket, such as a fabric bandage or ankle compression stockings. ③ice-ice pack: If there is severe pain and swelling, rest your ankle as much as possible for the first 24~48 hours, during which time, soak your foot in cold water or apply an ice pack (protect your skin with a towel and make sure that the ice pack covers your ankle for 15~20 minutes three times a day or until the swelling begins to subside). ④Anti-inflammatory and analgesic medications can reduce pain and swelling, as well as speed up recovery. ⑤ Appropriate intervention of Chinese medicine can accelerate symptomatic relief and recovery. The second step of treatment-functional treatment: When the treatment emphasizes the restoration of ankle function, splints, braces, tapes, or elastic bandages are commonly used instead of braking (e.g., with plaster tube-type immobilization). There are various types of brace immobilization; we commonly use stirrup type braces that allow walking in shoes. Functional treatment of home rehabilitation program: ① 1~2 weeks after sprain: range of motion flexibility stretching training and training of muscle strength . Typically, patients can begin range of motion and stretching exercises within the first 48 hours and continue until the patient’s ankle was pain free prior to the sprain. Exercises can be started sitting in a chair or on the floor, and when ankle symptoms improve, the patient can perform standing exercises. If symptoms do not improve in 2 to 4 weeks, the patient must see a physician or specialist. Range of Motion Flexibility Stretching Exercises: Ankle Dorsiflexion Flexibility Stretching Exercises: Place the heel of the foot on the floor. Pull the toes and foot farther as possible, then relax as far as possible. Repeat 10 times. Practice as many exercises as possible in the first week. ANKLE A, B, C FLEXIBILITY STRETCH EXERCISE: Place the heel on the floor and use the big toe of the foot to move in the direction of the A, B, C strokes as far as possible. Ankle joint muscle exercises: foot pressure, foot pulling muscle exercises: (A): elastic band looped in the foot, hand pulling the elastic band tightly, downward pressure lasts a few seconds, repeat 30 times. (B): elastic band loop in the foot, will be more in a chair or table, slowly pull up the foot for a few seconds, repeat 30 times. Ankle valgus exercise: sit on the floor, elastic band looped around the foot, normal foot riveted to the elastic band, slowly valgus the injured foot, repeat 30 times. Ankle inversion exercises: sit on the floor, cross the good leg over the injured leg, rivet the elastic band on the injured foot and slowly invert the injured foot. Repeat 30 times. ② The 3rd to 4th week after the sprain: stretching and muscle strengthening exercises. Seated stretching exercises: elastic band ring in the foot, keep the knee straight, hand slowly tighten the elastic band, until the calf has a sense of lengthening, hold for 15 seconds, repeat 10 to 20 times. Standing position stretching strengthening exercises: stand an arm’s length away from the wall, toes of the injured foot forward, placed behind, foot followed by the ground, straighten the knee joint. Slowly bend the front knee until the back side of the calf has a lengthening sensation, mainly stretching the Achilles tendon. Interval weight lifting muscle strengthening exercises: toe weight lifting, hold for one second, slowly lower to standing position. Repeat 20 to 30 times. When the patient is more powerful, the injured foot can be put down normally, and gradually increase the weight bearing on the injured foot according to the above method. Continuous weight lifting muscle strengthening exercises: hold the hand on the wall, the back of a chair or other balancing support, lift the heel off the ground. Slowly lower the heel. Repeat 15 times, and practice several times a day. If practiced on stairs, repeat the stair-starting position. The ankle joint is subjected to a lot of stress during this exercise, so consult your physician before performing the exercise. (iii) Proprioceptive exercises: Do these exercises under a doctor’s supervision. Including: Crossover exercises, eyes open feet to single foot balance board exercises, eyes closed single foot balance board exercises, movement balance exercises, disturbed balance exercises. ④ Specialized intensive exercises and tests are required for athletes.