Women with more severe cases of prolonged and continuous periods may want to consider pharmaceutical options. In cases of hormonal imbalance, most doctors prescribe oral contraception or any hormonal therapy to regulate the menstrual cycle and balance your hormone levels.
The bone that you sit on is also known as the sits bones. The  scientific name is the ischium which is a large swelling  posteriorly on the superior ramus of the ischium.
The gluteus maximus muscle lies over it when a person is standing; however, when he or she sits down, the muscle shifts to a position behind it and the tuberosity bears the majority of the weight. This bone is an attachment point for several muscles and ligaments.