Answer: A number of factors can cause this problem, such as eating disorders, significant weight loss or gain, anemia, menopause, thyroid disorders, hormonal imbalance, liver disease, tuberculosis, irritable bowel syndrome, diabetes, recent birth or miscarriage, polycystic ovarian syndrome, uterine abnormalities, and other health condition. Menstrual cycles tend to be irregular during the first few years after menstruation starts and also at the end of a woman’s menstrual years, when she is approaching menopause. Ginger is highly beneficial in regulating menstrual cycles and also relieving menstrual pain. cinnamon tea, sprinkle cinnamon on your foods, or chew cinnamon sticks regularly. Dry roast a handful of sesame seeds. Grind them along with one teaspoon of jaggery into a fine powder. Take one teaspoon of this powder daily on an empty stomach in the luteal phase, or second half of your menstrual cycle (two weeks before your period starts), for a few months. Simply eating a piece of jaggery, also known as gur, will also help regulate menstruation. Note: Do not use this remedy during your periods. Green, unripe papaya considered useful in regulating menstrual flow.