Grumpy, irritable may be caused by the following reasons: First, social stress factors, if you encounter economic pressure, family relations, bad relations between husband and wife, as well as always contradictory, conflict and other issues, it is possible to become irritable, easy to get angry, because long-term stress or poor interpersonal relations people are prone to become particularly sensitive, fidgety, in serious cases will be quarrelsome with people, fights, etc. Second, it may be a personality factor, some people are irritable, temperamental, and some people are introverted, sensitive, and at the same time strong and perfectionist, easy to think things when the bull’s-eye, this time it is easy to become particularly unstable temper, easy to provoke, easy to get angry. Third, there may also be anxiety disorders and other mental illnesses caused by anxiety disorders, the performance of patients is anxious, irritable, quiet, as well as always walking around, these patients are unstable temper, easy to get angry, or because of trivial matters and fights, or even impulsive injury, etc.. Fourth, it may also be caused by somatic diseases, common is the problem of hyperthyroidism, hyperthyroidism patients are easy to unstable temper, love to get angry, the above reasons are more common.