Lyme Disease is an infection passed to humans through the bite of an infected deer tick. It cannot be spread from one person to another.
Deer ticks are smaller than the common dog tick.
A deer tick, before it becomes filled with blood, looks like a mole or blister. Some deer ticks are only the size of pinheads. They may be black or dark red in color. Signs of Lyme Disease Lyme Disease occurs in three stages, though not everyone goes through all the stages. A few days after the bite, a rash appears, usually on the chest.