What is wrong if your head has been hurting on the left side and sometimes when you wake up your head will ache and give your teeth a numb feeling?

umm you probably have inflamed gums or a cavity in ur teeth, it can also mean ur wisdom teeth are pushing into ur existing teeth and u need to take them out. Or if you're also having aches in your neck, it could be a lymph infection or inflamation which could be serious, so best thing to do is see a doctor definitely as soon as you can. You could also have a nerve in ur brain growing in a wrong direction and maybe ebing damaged and that could be causing the pain, so the best thing to do would be to get a blood test, and maybe a ct scan as well as an xray of ur teeth =)

hope that helps, I know that answer is kind of all over the place haha sorry!