Right side hip waist area hurts. Not all way to back. No bruising. Been to hosp. They didn't see anything on ultrasound. Starts under side of boob?

Muscle, tendon pain. You are describing muscle or tendon pain. This is generally related to activity or exercise. It is often helped by using a heating pad as well as the tylenol (acetaminophen) that you are taking. Stop exercising (if you are doing it) for a week.