There are many reasons for sudden upset, mainly the following: 1, encountered frustration as well as stress and other psychosocial factors, such as marital discord, heavy economic burden, family conflicts, academic pressure, etc. These problems are difficult to solve overnight, so they may be suppressed in the heart for a long time, so that they suddenly become irritable, irritable, and in serious cases, problems such as quarrels and fights with others. 2, may be The problem of depression and anxiety is that patients with depression and anxiety are likely to be depressed, unhappy, easily stressed, anxious, and worried every day, accompanied by problems such as being upset, easily provoked, and easily irritated. 3, it may also be caused by physical reasons or physical diseases, such as abnormal secretion of thyroid function and hyperthyroidism. The patient with hyperthyroidism is prone to symptoms such as high temper, easy irritability and anger.