Children at this age are in kindergarten, or at home, most of such bad emotions related to kindergarten or home, such as: boredom. During our communication with many parents of children, we found that most of these children are raised intergenerationally, and some of them who are not raised intergenerationally may have very busy mothers and fathers, and when they come home and find their children watching TV or playing alone, they will think their children are very good, and then the parents will go to do their own things. But the child will feel bored when playing alone, and then he will use these self-soothing self venting a way. The main source of bad emotions is from school and family, school is mainly the teacher’s criticism, discord between classmates, or not quite adapt to the school environment, for example, the school noon requires sleep, but the child does not like to sleep at noon, but the teacher must sleep, he will feel very uncomfortable, then he may be through this action to self-soothe themselves at noon, to achieve a stable emotions. There are also many cases of family reasons, for example, the child he may not have had this problem before, suddenly there is a little baby at home, such as the mother and father suddenly gave birth to a little sister or brother, or relatives of children over to play, so suddenly everyone’s attention to him scattered, he will feel very nervous, very unhappy, but can not vent, there will be this self-soothing situation.