How long does a bump on the head last?

I stupidly hit the side of my head a few inches from my ear with my iPhone next few days after I found a bump there. It was a bit big and a week later its still there but not as big as what it was, it hurts when I press it with my finger. I sleep perfectly have no loss of concentrating or anything, I feel no hole on my head just a bruise and a bump. I'm wondering how long a bump on the head lasts. And yes I know what I did was foolish but did it in anger and won't be doing it again.

From your description it appears that you just have a BIG BUMP. Calm down and ice it so the swelling goes down. It may take a week to disappear.