Menstruation, commonly known as the period, is a natural body process in females, where blood and tissues come out of the uterus through the vagina. The average cycle is 28 days; however, it can be anywhere between 24 and 32 days. If the days are longer, then you are a patient with irregular periods. It can be caused due to various reasons, including stress, unhealthy food, overconsumption of alcohol, sex, etc.