If you develop blisters after being bitten by an insect, don't burst them because they may become infected. Blisters don't usually cause pain unless they rupture (burst) and expose the new skin underneath. If possible, use an adhesive bandage (plaster) to protect the blistered area.

How do you treat an insect bite blister?

When the blister first forms, gently clean it with soap and water, then cover it with a bandage and petroleum jelly, like Vaseline. Don't break the blister. If the blister is itchy, you can apply lotion before covering it. If the lotion doesn't work, you can take an oral antihistamine.

Which insect bites cause blisters?

Midge or gnat bites

Midge and gnat bites often look similar to mosquito bites. They usually cause small, red lumps that can be painful and very itchy, and can sometimes swell up alarmingly. Some people may also develop fluid-filled blisters.