Insect Bites that Cause Blisters

Insect bites cause various allergic reactions on the skin such as rash, redness, lumps, blisters, etc. The severity of the reaction caused to the skin varies depending upon the type of the insect bites and the severity of the bite. Blisters are caused as secondary allergic reaction to the skin due to insect bites. When an insect bites, there is irritation and itching over the skin due to its sting, and venom that comes in contact with the skin. We feel like scratching the skin, and then that can develop in into a blister. Insect bites that cause blisters may also cause infection to the skin, if the sting comes in contact with dirty fingernails while rubbing the rash. Blisters are tiny fluid filled packets that are usually caused due to compulsive rubbing of the skin.

If the blisters are a result of insect bites, then it is likely that you notice some other signs on the skin initially such as rounded red rash and small bumps on the skin. Any of the insect bites can cause blisters, but most of the times, blisters are formed due to spider bites, black widow spider, and brown recluse spider as well. Formation of blister on the skin is the defense mechanism adapted by the body, in which the upper layer of the skin in separated from the rest of the layers of the skin, and then the fluid called serum is filled within it. This protects the other layers of the skin. If the blister formed is lager in size, it is called as bullae, and these types of insect bites are mostly caused in case of severe insect bites.

Symptoms of blisters due to insect bites:

  • The small bumps that are caused on the skin due to blisters are usually painful even when little pressure is exerted
  • A very less number of blisters are painless
  • Sometimes blisters caused due to insect bites may be blood filled, and this gives them a reddish appearance
  • If the blisters are blood filled, they are more painful as compared to the normal ones
  • Constant touching of the blisters with the hands, and contact with some other contaminated objects causes infection in the blisters
  • Infected blisters are pus filled blisters
  • Pus filled blisters have a circular ring of red color around the circumference of the blister

Treatment for blisters due to insect bites:

Most of the times, blisters do not require any treatment, and they dry and shed off themselves within 6 to 7 days. The only thing you need to do is avoid friction to the blisters and their contact with contaminated objects. Applying a little bit of petroleum jelly and talcum powder to the blisters will help in preventing the symptoms from aggravating, and causing irritation to the skin.

The area  around the blisters should be kept dry, and avoid its contact with water as far as possible. Symptoms of blisters aggravate if they get moist conditions. You can also take oral medications to stay away from the infection if any, caused to the blisters.

When the blister breaks open, colorless fluid, blood and pus flows from it. This should be rubbed using an antiseptic solvent, and hold cotton over it for some time, and press it slightly. Blood flowing from it will stop within a couple of minutes.

There can be other reasons for these blisters such as exposure to chemicals, repetitive friction of the skin against some rough surface, exposure to high temperature and some diseases as well. It is essential that you identify the exact cause of the blister and not confuse any other type of blister with insect bite blister. Insect bites that cause blisters can be managed through simple precautionary measures.

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