Ankle sprain, commonly known as “broken foot”, is a relatively common joint ligament injury. Nowadays, people frequently engage in sports activities, and if they do not prepare adequately before the activity, it is easy to cause ankle sprain; when the body falls from a high place or goes down the steps, not standing firmly or stepping on uneven places, it can also cause ankle sprain. However, because “broken feet” are more common, they are often overlooked. Many people think that ankle sprain is an irrelevant “soft tissue injury”, so the treatment is not active and thorough enough, lacking corresponding rehabilitation techniques and means, resulting in unsatisfactory functional recovery, not paying attention to rest in the early stage, continuing walking activities, and only when they feel the swelling and pain aggravate, they dare not start activities, which is exactly the opposite of reasonable treatment. This is exactly the opposite of reasonable treatment, leading to the aggravation of the injury or long-lasting. According to statistics, 92% of basketball players have had a lateral ankle sprain, 83% have had more than two sprains, and 59% have various residual sequelae. A “broken foot” is usually a lateral ankle sprain, accounting for about 16% of emergency sports injuries. So, why is the lateral ankle more likely to be sprained? The reason: 1. In order to fight against gravity, the force of the foot stirrup is much greater than the force of the foot hook, so that the ankle is often in a state of imbalance, and it is easy to be injured by other external forces. 2, foot stirrups or wear high heels when the ankle joint is in the most relaxed state, but also very easy to be damaged after the force. Ankle injuries are often caused by inadequate preparation before exercise and the rush to carry out intense and loaded exercise. In addition, the external force, while the muscles contract violently (such as basketball activities, bar training, high jump and long-distance running, etc.), can also cause muscle and ligament tissue strains in the ankle joint. If the lateral ankle sprain develops into chronic instability, the patient feels that the ankle joint is sore and swollen under general work intensity, especially when the weather changes, and feels that the ankle joint is unstable when walking, and often sprains suddenly, or even has repeated recurrent dislocations of the ankle joint. Patients are afraid to walk on uneven roads and feel discomfort in the ankle joint especially when they start and stop suddenly. Therefore, the first ankle sprain should be taken seriously and emergency treatment should be carried out first: stop exercising immediately and apply pressure bandages and cold compresses until the pain is significantly reduced or disappears. Severe sprains can be fixed with adhesive tape, plaster or ankle brace. Local hot compress, Chinese herbal medicine and fumigation can reduce swelling and pain and promote exudation absorption and accelerate recovery 24~48 h after injury. Ankle sprains should be treated at a regular hospital in a timely manner after emergency treatment. If the symptoms disappear completely after 3-5 days of acute treatment, the sprain will enter the chronic phase. When the ankle joint has sufficient mobility, proprioceptive and balance training can be added to the training to help prevent recurrence of ankle sprain; finally, functional training and various sports activities can be resumed (the specific recovery plan and time for the acute and chronic phases depend on the degree of injury and other specific circumstances).