Adhesions and endometriosis are the reasons of pain in stomach. Abdominal pain after hysterectomy is quite common in women and is usually seen declined within a year or so. These adhesions are formed in the body after the body gets healed after a trauma or surgery. Also these adhesions hinder movement of parts which were previously mobile. This hindrance causes pain. It is recommended to see a doctor to get rid of this, rather than taking otc drugs for pain relieving.