What can a mild sharp pain in a person s back, about waist-high on the right be from? I am female, 54, overweight. It started Saturday evening. It s not severe, but it s there. I can still eat, drink, walk, stand, go to the bathroom, and don t feel nauseous. It s constant and is not brought on by anything I am doing. I read about a gallbladder attack, but the symptoms don t match up completely.