What to do if tick head is left under human skin?

Ticks stick their heads in humans and suck their blood. If you are removing a tick do not squeeze the end (the bloodsack.) This can cause the blood that the tick has gotton from other animals into your bloodstream and may give you a disease. If ticks are attached to you long enugh(approx. 1-4 weeks) they can give you Lyme Disease.