What is it called when someone cant be hit in the head?

please someone answer me im really scared what should I do he's acting tha same and im just watchin him closely and seeing hh...

I was jumping off a big tall rock into the water. A man said he checked for rocks, and there wasn't any. But, I found one.....

Ok so yesterday when I was on my way up to english I fell and smashed my head of the door..it left a big lump and was sore fo...

Today in gym I got hit with the basketball on my upper lip. It felt funny for a while and kind of hurt, kind of numb, but the...

how to make a bump on someones head dissapear fast??!!

You get this weird feeling/pain in your head, and it's very sudden. Does anyone know what I'm talking about? Like, it's kinda...

I got hit with a soccer ball today (on my forehead) and I blinked and saw white like below my eyes...

My sister hit her head and now im worried what will happen. Please give me some advice.

Is it normal that after someone really close to you commits suicide that you cant eat because it make you sick?

Earlier today while I was getting off my boat I slipped and hit my head on the side of the boat it wasn't bleeding or anythin...