It depends upon possible cause...if any pathology it has to be dealt medically. Menstrual cycle irregularities can have many different causes, including: Pregnancy or breast-feeding. A delayed or missed period can be an early sign of pregnancy. Breast-feeding typically delays the return of menstruation after pregnancy. Eating disorders, extreme weight loss or excessive exercising. Eating disorders — such as anorexia nervosa — extreme weight loss and increased physical activity can disrupt menstruation. Polycystic ovary syndrome (PCOS). This common hormonal disorder can cause small cysts to develop on the ovaries and irregular periods. Premature ovarian failure. Premature ovarian failure refers to the loss of normal ovarian function before age 40. Women who have premature ovarian failure — also known as primary ovarian insufficiency — might have irregular or infrequent periods for years. Pelvic inflammatory disease (PID). This infection of the reproductive organs can cause irregular menstrual bleeding. Uterine fibroids. Uterine fibroids are noncancerous growths of the uterus. They can cause heavy menstrual periods and bleeding between periods...Consult nearest gynecologists they will do the needful.