Baby was bitten by mosquitoes appeared red and swollen is due to the release of acetic acid stimulation of the skin after the bite, can be treated in the following ways: 1, just bitten: mosquito bites cause local skin redness, itching should avoid scratching, so as not to lead to increased histamine release, aggravate the symptoms, and may cause skin infections. It is recommended to wash the affected area with soapy water, local cold compresses with ice, or external application of cool oil, can relieve itching, redness and swelling of the symptoms; 2, local lumps larger: if the local formation of relatively large lumps, can follow medical advice appropriate choice of mometasone furoate cream for application, but not recommended for long-term use. If the baby lumps do not subside for a long time, you can also follow the doctor’s advice oral antihistamines, while using glycolate lotion, boric acid solution for application or cold wet compresses; 3, redness and inflammation, breakage: because the baby’s skin is relatively delicate, easy to scratch and breakage, and then infection, manifested as fever and other systemic reactions. Minor infections can be treated by applying erythromycin, chlortetracycline and other drugs. If the symptoms do not ease or worsen for a long time, it is recommended to go to the hospital for treatment. In daily life, parents can use mosquito nets, mosquito repellent, etc. to prevent their babies from being bitten by mosquitoes.