What causes redness, swelling, and heat in the ear after a mosquito bite?

May 12, 2022 Source: Cainiu Health
Disease description:

My mother is 42 years old. Recently, her ear was bitten by a mosquito, and she has since noticed swelling and fever in the area. She would like to know why the ear has become red, swollen, and warm after the mosquito bite.

Doctor's answer (1)
Dr. Liu Wan
Redness, swelling, and warmth of the ear following a mosquito bite may clinically result from the following causes: First, after biting, the mosquito injects toxins into the ear, triggering a localized cutaneous toxic reaction in the patient—manifesting as redness, swelling, and warmth—a very common clinical presentation. Second, the toxins injected by the mosquito may provoke a localized allergic reaction in the ear. If you experience mosquito bites on the ear accompanied by redness, swelling, or warmth, it is recommended to promptly consult an otolaryngologist or dermatologist for evaluation.