Why do blisters form after a mosquito bite?
Disease description:
My son is 11 years old. He developed many lumps from mosquito bites. Later, the teacher called us to school and said that the child had blisters on his body. They were worried about the possibility of spreading to other students. I would like to understand why mosquito bites sometimes cause blisters.
Doctor's answer (1)
Dr. Wang Xiaoyan
Mosquito bites that result in blistering are primarily the outcome of multiple factors acting together. Mosquito saliva contains certain amounts of toxins, which are injected into the skin during biting and can cause irritation, leading to redness, swelling, and itching, and possibly resulting in blisters. Individual differences in physical constitution also play a significant role in blister formation; some people have allergic constitutions and are more sensitive to components in mosquito saliva, making them more prone to allergic reactions such as blistering. Additionally, immune responses also contribute to blister formation. After a mosquito bite, the immune system identifies and eliminates these foreign substances, potentially releasing inflammatory mediators during this process, which can cause blistering at the affected skin site. For cases of blistering due to mosquito bites, it is recommended to promptly take measures to alleviate symptoms, such as applying cold compresses and topical ointments, and to avoid scratching to prevent infection. If symptoms are severe or persist for a prolonged period, seeking timely medical attention is advised.
