Hysterectomy is the definitive treatment
Alternative options include
Hormonal therapy such as with a levonorgestrel IUD   
Uterine artery embolization
Uterus sparing resection
Hormonal therapy such as with a levonorgestrel IUD
Adenomyosis
Systemic Causes
Endometriosis
Cirrhosis
Molar pregnancy
Coagulopathy 
Ectopic pregnancy
Group A strep vaginitis 