Menstruation comes and goes in one day. Consider that it may be related to puberty or menopause menstrual disorders, ovulation bleeding, endocrine disorders, premature ovarian failure and other reasons. 1. Puberty or menopause: During puberty, women will have menstrual disorders due to immature development of ovarian axis, and during menopause, unstable hormone levels will also cause menstrual disorders due to decline of ovarian function. 2. Ovulation bleeding: a small number of women in the ovulation period when estrogen secretion is reduced so that the luteal function is insufficient, progesterone levels decline, there will be a small number of endometrial shedding caused by vaginal bleeding, some will be manifested as bleeding one day to stop, and some people may be mistaken for menstruation. 3. Endocrine disorders: Obesity, excessive dieting, irregular work and rest can cause endocrine disorders in women, which can lead to unstable hormone levels and may cause abnormal menstruation. 4. Premature Ovarian Failure: If ovarian hypogonadism occurs before the age of 40, it will result in low estrogen, affecting the regularity of menstruation, shortening the duration of menstruation, and decreasing the amount of menstruation. There may be other reasons why menstruation does not come for one day, and you should go to the hospital for a detailed examination and symptomatic treatment for the cause of the disease.