My Dad Didnt Hit His Head And Has Bumps On

my dad didnt hit his head and has bumps on his head. he said,he feels them swelling around the bumps. theyve been hurting him for a couple days and refuses to go to the doctor. hes been taking alot of tylenol against my requests. today hes been very.. slow. its like he has no memory. he was driving to the walk in today and pulled over then went home because he couldnt remember where he was going. im really worried and dont know what it could be.