My 10 year old daughter fainted after having blood drawn and immediately had a grand mal seizure. We saw the same thing happen 3 years prior, when she fainted after seeing her twin sister get a tooth pulled. She fainted, hit her head on the dental chair and floor and had a seizure. I am afraid that every time she faints, she will have a seizure. In this last episode, they immediately took her to get a CT scan. It was normal. Doctor said it was "fright" that caused vaso-constriction, that brought on the seizure.