The main cause of PMS is too much estrogen and not enough progesterone. There are a variety of symptoms in PMS that can be mild to debilitating. Mood swings, bloating, heavy bleeding, breast tenderness, acne, migraine headaches, severe menstrual cramps, and fatigue are common symptom associated with PMS. BHRT can help decrease these symptoms with a customized plan to balance the hormones and improve quality of life.