My mom's fiance is having seizures and Headaches, could anybody give me any information on the two?

Hey guys, my Mom’s Fiance was having headaches for the last few days (3–4) and this morning he had a convulsion that lasted a couple minutes. He was brought to the hospital to get a CAT scan and upon arrival he had another one. Both times he came out disorientated except the second one he was also angry and had to be sedated. What could these by symptoms of? Has anybody ever known anybody to experience this before?