Ice. Apply an ice pack to a bite or sting for 15 to 20 minutes once an hour for the first 6 hours. When not using ice, keep a cool, wet cloth on the bite or sting for up to 6 hours. Always keep a cloth between your skin and the ice pack. Do not apply ice for longer than 15 to 20 minutes at a time, and do not fall asleep with the ice on your skin.

Vinegar. No matter whether it’s the white or the apple cider variety, vinegar turns insect sting pain into a thing of the past. Pour it on the affected site, or mix it with baking soda to make a paste that you can apply to the bitten area. Out of vinegar? Try applying straight lemon juice instead.

Onion. Cut an onion, then rub it over the sting site. Doctors aren’t quite sure how this works, but the onion contains enzymes that seem to break down inflammatory compounds. Other people swear by smearing a crushed clove of garlic over the skin.

Call your doctor if any of the following occur during home treatment:
New symptoms develop.
Symptoms of a skin infection develop.
Flu-like symptoms develop.
Symptoms become more severe or more frequent