It is narrated from Hazrat Aisha (may Allah be pleased with her) that once Fatimah bint Hubaysh (may Allah be pleased with her) came to the service of the Prophet (peace and blessings be upon him) and said, "My menstrual bleeding continues all the time." The Prophet (peace and blessings be upon him) said, "This is not menstruation, it is blood from a vein. Therefore, during the days of menstruation, leave the prayer, and after that, perform ghusl and do wudu for every prayer and offer the prayer, even if drops of blood fall on the mat."