Why do infants and young children experience redness and swelling after being bitten by mosquitoes?

After being bitten by mosquitoes, infants and young children often develop redness and swelling, primarily due to an allergic reaction caused by the injection of anticoagulant substances present in mosquito saliva into the skin. Infants' skin is more delicate and sensitive to mosquito toxins, so the redness and swelling may appear more pronounced. In addition to allergic reactions, secondary bacterial infection can also cause swelling. After a mosquito bite, skin damage may allow pathogens to enter, leading to symptoms such as redness, swelling, and pain. When treating mosquito bites, parents can use alkaline substances like soap water to neutralize acidic toxins and apply antiallergic creams or lotions, such as calamine lotion, to relieve swelling and itching. If the swelling is severe or accompanied by other symptoms, prompt medical attention is recommended to avoid delayed treatment. At the same time, parents should also take effective mosquito prevention measures to reduce the chances of infants and young children being bitten.