Why Do Flea Bites Turn into Blisters?
Disease description:
I’ve been bitten by fleas, and blisters have formed at the bite sites, accompanied by some pain. Why do flea bites develop into blisters?
Doctor's answer (1)
Dr. Liu Wan
Flea bites that develop into blisters are caused by an allergic reaction. Fleas carry certain viruses, which—during biting—are introduced into the skin via the flea’s saliva, potentially triggering a localized allergic reaction characterized by blister formation. This may be accompanied by symptoms such as redness, swelling, pain, and itching. In cases of severe symptoms, medication may be prescribed under a physician’s guidance—for example, Elomet cream (mometasone furoate), prednisone tablets, or cetirizine tablets.
