It may be caused by the following reasons: 1.May be caused by anxiety disorder, patients with anxiety disorder will always be upset, nervous, afraid, interpersonal tension, look at everything, fidgeting every day, so they will lose their temper at every turn, and even in serious cases drop things, hit people, and quarrel with others, etc. 2.May be caused by mania, patients with mania are easily provoked, i.e. 3, may be caused by personality disorders, there are some personality disorders, people may be radical behavior, selfish, so it is easy to have some conflicts and conflicts with people, and irritable. 4, may exist some physical diseases or drug dependence and other reasons caused by. For example, some people have hyperthyroidism or alcohol dependence, and these people will become irritable, paranoid, and at the same time love to lose their temper at every turn.