Rest of the detail can be read here. Similarly, you may ask, what can cause long periods?
Long periods can be caused by a wide range of underlying conditions.
Similarly, is it normal to have periods after 15 days? It normally lasts 13 to 15 days, from ovulation until menstrual bleeding starts a new cycle. This 2-week period is also called the "premenstrual" period. Many women have premenstrual symptoms during all or part of the luteal phase.
Also to know, why is my period not stopping?
Summary. Having a single period that does not seem to stop is not usually a sign of a serious medical problem. Having long periods frequently can indicate one of several potential conditions, such as endometriosis or uterine fibroids. A doctor can help diagnose and treat these conditions.
Why have I had my period for a month?
If you usually have a regular cycle, a change in your cycle — such as suddenly having two periods in a month — could indicate a medical condition. Some health conditions cause bleeding that can be mistaken for a period: Pregnancy can cause spotting. Sexually transmitted infections can cause discharge and bleeding.