Children hitting themselves in the face may be due to the psychology of self-blame, mosquitoes on the face and mental problems. 1. The psychology of self-blame: when a child feels deep self-blame, he may want to slap himself a few times, so the child’s behavior of hitting himself in the face. 2. Mosquitoes and insects on the face: If there are mosquito bites or ants crawling on the child’s face, the child will stop the mosquitoes or ants from biting his/her face by hitting his/her own face to knock them off or kill them. 3. Mental problems: children with mental problems will not only punch themselves in the face, but also have other abnormal behaviors of self-harm and hurting others, such as scratching their own skin, banging their heads against the wall, and attacking people around them. If a child punches himself in the face, it is recommended to go to a regular hospital to find out the cause, and then receive professional doctor’s treatment for the cause.