Ticks are small spiderlike animals. They bite to fasten themselves onto your skin and feed on your blood.
Ticks can carry diseases. But most ticks do not carry diseases, and most tick bites do not cause serious health problems.
Some people may have an allergic reaction to a tick bite. This reaction may be mild, with symptoms like a rash, itching, and swelling. In rare cases, a severe allergic reaction may occur.
Most of the time, all you need to do for a tick bite is relieve any symptoms.