There are several common reasons for foot sprain and special pain in the middle of the night: First, the foot sprain is not given sufficient attention and regular treatment is not carried out, such as braking of the ankle joint, cold compress and elevation of the affected limb. If the above treatment is not carried out, the swelling and pain symptoms will be significantly aggravated at night, and even affect the patient’s normal rest at night. Secondly, after the foot sprain, if the brake is not applied effectively at night, the patient himself cannot control his own movement during sleep. Therefore, the sprained foot should be treated promptly, mainly by braking, to avoid touching other foreign objects during sleep at night, which may cause painful symptoms.