A man gets angry with you for no reason, but you can't find any cause. Don't be discouraged, maybe it's really not your problem, but the man is having his "period". A man's "period" is different from a woman's, during which the man experiences cyclical physical and psychological emotional changes. During the "period", men will feel some physical discomfort and be in a negative physical and psychological state. Therefore, when a man is on his "period", what considerate you can do is to know the principle of a man's period and help him get through it safely.