Whether it is normal for your period to be 4 or 5 days early needs to be determined by your own menstrual cycle. 1. The interval between the first day of menstruation and the first day of the next menstruation is called a menstrual cycle. It usually lasts 21-35 days, with an average of 28 days. That is to say, 28 days ahead of a week to push back a week is the normal range, at this time the menstrual period 4, 5 days ahead of the normal. 2. The menstrual cycle is shorter than 21 days, mostly due to luteal insufficiency, which can easily lead to infertility or miscarriage, and progesterone can be applied in the second half of menstruation, and oral contraceptive pills can be taken to regulate the cycle. 3. Menstrual cycle longer than 37 days is the prolongation of the menstrual cycle, with the body’s hormone deficiency, polycystic ovary syndrome or hyperprolactinemia and other endocrine diseases, according to the different causes of the use of appropriate drugs and other treatments. Menstruation is also related to emotions, activities, stress and other aspects, try to avoid these unfavorable factors before menstruation, in favor of regular menstruation. Consult your physician for specific medications.