Why is my baby's hand swollen after being bitten by a mosquito?

Apr 17, 2025 Source: Cainiu Health
Disease description:

When we went out for dinner today, the baby's hand was bitten by a mosquito and became swollen. After scratching for a while, a lump appeared locally. I would like to know why the baby's hand became swollen after being bitten by a mosquito?

Doctor's answer (1)
Dr. Zhou Xiaofeng

A baby's hand may swell after a mosquito bite due to the introduction of mosquito saliva into the body, which causes a localized inflammatory reaction. To manage this, keep the child's skin clean and discourage scratching with the hands to prevent infection. Calamine lotion or anti-itch creams can be used. As a preventive measure, it is best to implement mosquito control strategies, such as keeping the indoor environment dry and well-ventilated, avoiding water accumulation. Mild mosquito repellents can also be used, or a mosquito net can be hung over the child's bed.