When someone has menorrhagia, their periods are heavier than normal. Young women commonly have this condition. Some symptoms are cramping bad, feeling tired because you are losing too much blood, and having to change pads or tampons every hour for 2-3 hours in a row. The hormonal imbalance might cause it; so could uterine fibroids or something like endometriosis among other things. Proper assessment by a gynecologist should be done who will recommend treatment options.