yesterday my mom and grandmother were hit fro m behind in our minivan, by a pick up truck. my mother is fine. but my grandmother's head hit the seatbelt buckle and has a goose egg. she went home and phoned us later that night to tell us that she has a stiff neck as well and a burning sensation in her lower back, just above her buttox. she refuses to go to the doctor but we have told her its necessary because this burning sensation does not sound good... should seek medical attention?