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.
A group of muscles called the erector spinae -- sometimes referred to as your sacrospinal muscle group -- supports your spine. Your glutes consist of the gluteus maximus, gluteus medius and gluteus minimus. These muscles make up your buttocks, with the gluteus maximus being the largest muscle in the human body. Your abs and obliques work together with your lower back and glutes to help you rotate, balance and stabilize the body during sitting and standing. The Effect of Seat Variables. Variables such as seat height and the presence of arm rests effects how you sit or stand.