Is it normal for aunt to advance 4 days?

Women in childbearing age show menstruation four days ahead of schedule belongs to the normal situation, women's menstruation is not fixed, sometimes if affected by mental stress, fatigue or irregular life and other factors, will cause hormone secretion imbalance, can show menstrual cycle ahead of schedule, delayed situation occurs. As long as it is within a week ahead or delayed within a week, are normal. Therefore, women in order to minimize the occurrence of menstrual disorders, usually also to maintain a regular life, comfortable mood, appropriate to eat some nutritious food, to prevent the occurrence of cold. At the same time, to prevent staying up late, but also conducive to menstrual cycle rules, reduce endocrine disorders. For women of childbearing age, the general menstrual arrival time will be about 30 years, often showing menstrual disorders will cause endocrine disorders.