Horse Fly Bites: What You Need to Know

Published on June 16, 2025 by Stella
Featured

Horse fly bites are very common all across America and are very bothersome to people there, especially in warm seasons. These aggressive insects do not spare anyone! They use their sharp parts to feed on human or animal blood. The bites cause an burning sensation instantly and can cause red, swollen blisters. Being aware of the symptoms, side effects and the right treatment will be of great help to you to keep your health safe. Being aware of the symptoms, side effects and the right treatment will be of great help to you to keep your health safe.

Stages of horse fly bites

First of all, the female horsefly that needs blood for mating, lands on the skin if it is exposed. Instead of piercing the skin like a mosquito, it cuts through the skin with its saw-like mouthparts.

At the same time, the fly secretes its anticoagulantn (insulin) to prevent the blood from becoming semi-solid. If the bite was scratched, it can cause a big red rash.

Few hours after the bite, you experience swelling, redness, and sometimes a burning sensation. The majority of horsefly bites will be gone within a couple of days. But some may go on for a longer time. Learning the signs of these stages allows one to react quickly and reduce the unpleasant feelings.

Are horse fly bites deadly?

Horseflies are very aggressive in nature and their bites are very painful.They carry a high risk of allergic reactions. The main danger is the pain and irritation they cause, which can cause even more severe symptoms than other insect bites. Usually, for most people, symptoms are-

  • Discomfort
  • Swelling
  • Redness

Someone can be very sensitive to the proteins in the saliva of the horsefly and get an allergic reaction. The allergy reaction is diagnosed through a widely spread rash, running hives, shortness of breath, swollen eyelids or lips, dizziness, and weakness. When the situation gets severe, which is called anaphylaxis, it becomes a medical emergency and help has to arrive immediately.

Another thing that is at stake is infection. Since the horsefly bites are very deep, the skin gets torn and bacteria can come in there. Especially if that place gets scratched or is left without being cleaned properly. Signs of infection, for instance, are increase of pain, pus, redness that spreads, and fever. Horsefly bites might very rarely be the cause of tularemia spreading. In the United States, it is a very rare case.

Generally speaking, although horsefly bites are not a big danger the main thing to do is to keep an eye on how the symptoms are evolving and to see a doctor if a strong allergic reaction or infection are suspected.

How can I treat horsefly bites?

Horsefly bites should receive treatment as soon as possible to avoid going through any complications.

  • Start with cleaning the bitten area very well with soap and water in order to remove the bacteria and to prevent infection.
  • Use an ice pack for atleast 10 minutes to decrease the swelling and numb the pain.
  • Do not scratch the bite.
  • Using aloe vera or honey might be one of the home remedies.
  • In case you see discharge, redness, or fever or if you get an allergic reaction, call the doctor immediately.

Although, horsefly bites heal without complications in a few days after receiving the appropriate treatment.

Conclusion

Horse-fly bites are gross and painful. Be aware of how these bites happen, stages of these bites, and how to treat them properly. It will help you to protect your health and be confident while outdoors.

  • Be observant.
  • Keep the place clean.
  • Do not hesitate to ask for help.