Ticks are parasitic in nature and they attach themselves to a host to drain their blood. Hosts include birds, reptiles, amphibians, and mammals, like you.
Not every tick carries disease. However, it’s important to remove a tick to stop it from potentially infecting you with a disease, or from causing any infection at the bite site. Removal also ensures that the tick doesn’t go on to breed in your home, causing an infestation.