It is not necessarily a sign of cancer, but it may be caused by ordinary menstrual irregularities or gynecological inflammation, which may also cause this condition. If you have such a problem, we suggest you to go to a regular hospital obstetrics and gynecology department for medical examination to clarify the cause. If cancer is diagnosed, radiotherapy and immunotherapy may be needed; sometimes gynecological inflammation, such as cervicitis and other diseases, may also cause menstruation just a week after leaving, so if necessary, you can take some anti-inflammatory drugs for treatment; if menstrual disorders may also occur, treatment can be carried out under the guidance of a doctor; if you are taking birth control pills, it may also cause vaginal bleeding. If you are taking birth control pills, vaginal bleeding may also occur, which is a normal phenomenon. The clinical manifestation of cancer is incessant menstrual flow and irregular vaginal bleeding. You should pay attention to keep clean and hygienic when you have your period, do not overwork, and pay attention to balanced nutrition and happy mood in order to have a smooth menstrual cycle.