Ticks are small, insect-like creatures that live in woods and fields. They attach to you as you brush past bushes, plants, and grass. Once on you, ticks often move to a warm, moist location, like the armpits, groin, and hair. They typically attach firmly to your skin and begin to draw blood for their meal. This process is painless and most people will not notice the bite.
Ticks can be fairly large -- about the size of a pencil eraser -- or so small that they are almost impossible to see. Ticks can cause a variety of health conditions ranging from harmless to serious.
See also: Tick bites
While most ticks do not carry diseases, some ticks can cause:
Watch for the symptoms of these diseases in the weeks following a tick bite:
- Muscle or joint aches
- Other flu-like symptoms
- Stiff neck
- Swollen lymph nodes
Watch for a red spot or rash starting at the location of the bite.
The tick itself can cause paralysis in humans (called tick paralysis). Symptoms include:
- Spreading paralysis
- Do NOT try to burn the tick with a match or other hot object.
- Do NOT twist the tick when pulling it out.
- Do NOT try to kill, smother, or lubricate the tick with oil, alcohol, vaseline, or similar material.
Call immediately for emergency medical assistance if
Call your doctor if you have not been able to remove the entire tick. Also call if in the days following a tick bite you develop:
- A rash
- Flu-like symptoms
- Joint pain or redness
- Swollen lymph nodes
Call 911 if you have any signs of:
- Chest pain
- Heart palpitations
- Severe headache
- Trouble breathing
If a tick is attached to you, follow these steps to remove it:
- Wear long pants and long sleeves when walking through heavy brush, tall grass, and densely wooded areas.
- Pull your socks over the outside of your pants to prevent ticks from crawling up inside.
- Keep your shirt tucked into your pants.
- Wear light-colored clothes so that ticks can be spotted easily.
- Spray your clothes with insect repellant.
- Check your clothes and skin frequently while in the woods.
After returning home:
- Remove your clothes and thoroughly inspect all skin surface areas, including your scalp. Ticks can quickly climb up the length of your body.
- Some ticks are large and easy to locate. Other ticks can be quite small, so carefully evaluate all black or brown spots on the skin.
- If possible ask someone to help you examine your body for ticks.
- An adult should examine children carefully.
Bolgiano EB, Sexton J. Tick-borne illnesses. In: Marx JA, Hockberger RS, Walls RM, et al, eds. Rosen’s Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 132.
Last reviewed 1/2/2011 by Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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