Can Fleas Give You Hives?

Fleas are known to cause allergic reactions in people who have sensitive skin, and their bites can cause a rash. This rash often takes the form of a small, red pustule on the skin. It can also cause swelling, blistering, and itching.

Flea bites can cause a severe allergic reaction. The reaction varies in intensity, and can occur over a period of several days. At the beginning, you may experience welts or hives. They will likely be painful and itchy, and may remain for up to a week. The welts may be localized, or they may be widespread. The risk of getting hives from flea bites is higher in people who live with pets, have livestock, or have rodent infestations.

In the southwestern US, fleas can transmit Yersinia pestis, the bacterium that causes plague. Those who live in this area should take action as soon as they notice a flea on their skin. Using insecticides to kill fleas is important, but it is not always effective. It’s important to find a veterinarian to help treat the problem.

Another problem caused by fleas is papular urticaria. The condition is caused by a severe allergic reaction to the saliva of a flea. While papular urticaria can be caused by many different factors, fleas are commonly associated with a pet.