Skip to content

Allergies Health Center

Font Size
A
A
A

Mosquito Bites

A mild allergic reaction to a mosquito’s saliva causes a small itchy welt that usually gets better within a few hours. But if you are highly sensitive, symptoms can last for several days. The small welt can develop into an itchy sore the size of a quarter.

It’s tough advice, but the best thing you can do is not scratch the bite. Scratching can create an opening in your skin that can allow bacteria in and cause infection.

Recommended Related to Allergies

Relief for Allergies at School

Relief for allergies at school and day care is an urgent problem for many parents and kids. Consider the statistics: As many as 40% of children in the U.S. suffer from seasonal allergies, and one in every 17 children under the age of 3 has a food allergy. How can you work with teachers, coaches, the school nurse -- and your family -- to keep allergies at school under control? How can you help your child avoid missing important class days and be comfortable and productive while in school? If your...

Read the Relief for Allergies at School article > >

To relieve itch and reduce risk of infection:

  • Wash the area with soap and water.
  • Apply calamine lotion or anti-itch cream.
  • Put an ice pack on the bite.
  • Take an over-the-counter antihistamine.

If a bite causes fever, vomiting, or shortness of breath, call 911 or get to an emergency room immediately.

To prevent future bites:

  • Stay indoors at dawn and dusk and in the early evening.
  • Wear long pants and long sleeves when you go outdoors.
  • Apply bug spray with DEET or picaridin to all exposed skin.
  • Get rid of standing water where mosquitoes breed.
  • Use screens on windows and doors to keep mosquitos out.

WebMD Medical Reference

Reviewed by Varnada Karriem-Norwood, MD on October 16, 2014

Today on WebMD

man blowing nose
Make these tweaks to your diet, home, and lifestyle.
Allergy capsule
Breathe easier with these products.
 
cat on couch
Live in harmony with your cat or dog.
Woman sneezing with tissue in meadow
Which ones affect you?
 

blowing nose
Article
woman with sore throat
Article
 
lone star tick
Slideshow
Woman blowing nose
Slideshow
 

Send yourself a link to download the app.

Loading ...

Please wait...

This feature is temporarily unavailable. Please try again later.

Thanks!

Now check your email account on your mobile phone to download your new app.

cat lying on shelf
Article
Allergy prick test
VIDEO
 
Man sneezing into tissue
Assessment
Woman holding feather duster up to face, twitching
Quiz