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Symptoms
By Mayo Clinic staffMost people never notice their first mosquito bites. After being bitten several times, though, you're likely to start noticing, often almost immediately after the mosquito feeds. The signs include:
- A puffy, white bump that appears a few minutes after the bite
- A hard, itchy, reddish-brown bump, or multiple bumps, appearing a day or so after the bite or bites
- Swelling around bites
- Small blisters instead of hard bumps
- Dark spots that look like bruises
In children and people with immune system disorders, mosquito bites sometimes trigger:
- A large area of swelling and redness
- Low-grade fever
- Hives
- Swollen lymph nodes
When to see a doctor
If mosquito bites seem to be associated with more-serious signs and symptoms — such as fever, headache and body aches — contact your doctor.
References
- Whitehorn C. Mosquito vectors of infectious disease. http://www.uptodate.com/index. Accessed March 3, 2012.
- Auerbach RS. Wilderness Medicine. 6th ed. Philadelphia, Pa.: Mosby Elsevier; 2011.
- Simons E. Large local reactions to mosquito bites (skeeter syndrome). http://www.uptodate.com/index. Accessed Sept. 21, 2012.
- Castells MC. Insect bites. http://www.uptodate.com/index. Accessed Aug. 3, 2012.
- Habif TP. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 5th ed. Edinburgh, U.K.; New York, N.Y.: Mosby Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-7234-3541-9..X0001-6--TOP&isbn=978-0-7234-3541-9&uniqId=230100505-57. Accessed Sept. 24, 2012.
- Kulthanan K, et al. Mosquito allergy: Clinical features and natural course. Journal of Dermatology. 2010;37:1025.
- Questions and Answers: Insect repellent use and safety. Centers for Disease Control and Prevention. http://www.cdc.gov/ncidod/dvbid/westnile/qa/insect_repellent.htm. Accessed Oct. 11, 2012.
- Repellents are an important tool to assist people in protecting themselves from mosquito-borne diseases. Centers for Disease Control and Prevention. http://www.cdc.gov/ncidod/dvbid/westnile/repellentupdates.htm. Accessed Oct. 11, 2012.
- New pesticide fact sheet: Picaridin. Environmental Protection Agency. http://www.epa.gov/opp00001/chem_search/reg_actions/registration/fs_PC-070705_01-May-05.pdf. Accessed Oct. 1, 2012.
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