Menstruation 4 days early, this is a normal physiological phenomenon, not a disease for the time being do not worry, caused by many reasons, such as taking certain drugs that can easily lead to changes in the menstrual cycle, in the non-menstrual period to take emergency contraceptives or progesterone, etc., can make the period early, or recently irregular life, stay up late, diet is not normal, bad mood, stress, etc., also The normal menstrual cycle is between 21-35 days, 26 days is normal, there is no need to worry, there is no need to go to the hospital. When the menstrual cycle is less than 21 days or more than 35 days, it indicates the emergence of menstrual disorders and then go to the hospital, during the menstrual flow, pay attention to more rest, do not strain and cold, and can not eat cold food, mainly to avoid causing dysmenorrhea.