Aunt that is menstruation, menstruation is gone in a day, may be caused by pregnancy, premature ovarian failure, endocrine diseases and other reasons. 1. Pregnancy: Some women may experience a small amount of bleeding during the process of fertilized egg implantation, which may stop after one day and be mistaken as menstruation gone in one day. 2. Premature Ovarian Failure: After suffering from premature ovarian failure, due to the decrease of estrogen and progesterone levels in the body, the menstrual period may be shortened, so some women may experience the symptom of menstruation being gone in one day. 3. Endocrine diseases: when suffering from polycystic ovary syndrome, hyperprolactinemia and other endocrine diseases, it may lead to scanty menstruation, shortened menstrual period, and some women may also show symptoms of menstruation gone in a day. It is recommended to go to the hospital in time to see a doctor, after the doctor’s interview with the relevant items of examination, to clarify the specific cause of the disease, and then follow the doctor’s instructions to treat the cause.