Crying and laughing disorder is a condition in which the patient himself or herself cannot control his or her emotions, sometimes laughing and sometimes howling, and is unpredictable. This disease may be due to problems in the brain, and can be treated in the neurology and psychiatry departments of hospitals. The causes of crying and laughing disorders are mainly disorders of the brain function, abnormal mental activity, or may be due to the effect of certain stimulants. The key to preventing crying and laughing disorder: First, reduce the triggering factors Reducing the triggering factors is the key to preventing crying and laughing disorder, we must arrange the daily life, work and study. Often talk to the patient, so that he or she can more correctly treat the disease, correctly treat the reality of life, to help the patient to improve the ability to bear the psychological, to encourage the patient to enhance the confidence. Second, often move hands and feet often move hands and feet for the prevention of crying and laughing disorder also has a very good effect, we must insist on stretching arms every day, rotate the wrist, empty grasp every day, stretching arms, rotate the wrist, empty grasp hand, empty fist, throw the ball to catch the ball, play fitness ball, etc., each action to do 1 to 2 minutes. Foot sports, barefoot in the pebbles on the best results, or with the toes pinch walnuts, toes in the buckle and then straighten, the ankle left and right rotation, etc., each time to do 1 to 2 minutes. Third, to have a good living environment Diseases are born from the heart, crying and laughing disorder is no exception, experts pointed out: with personal emotions, personality, situation and so on. For parents, should try to create a relaxed family environment, do not be too strict on the children, so that the children are prematurely burdened with the thought that leads to mental collapse, which is called “speed is not enough”, a healthy and happy living environment, happy life is the prevention of crying and laughing disorder.