Before menstruation, the fire is particularly big, usually refers to the temper, the causes include mental stress, irregular work and rest or diet and endocrine disorders, etc., need to give timely symptomatic adjustment. 1. Mental stress: Before menstruation, most women experience excessive tension and anxiety, which is related to mental stress or overburdened thoughts. 2. Irregular work and rest or diet: If women do not pay attention to regular work and rest time, often stay up late, overwork or overeating, often eat greasy spicy food, etc., may lead to pre-menstrual symptoms such as irritability, temper. 3. Endocrine disorders: due to the imbalance of estrogen and progesterone secretion levels in the female body before menstruation, resulting in endocrine dysfunction, which can easily induce symptoms of emotional instability. It is recommended that women should do a good job of self-regulation, maintain a good mood, eat a light diet before menstruation, etc., and find abnormalities in a timely manner to avoid delays in the condition.