Infants by mosquito bites red and swollen can use soapy water, antibiotic ointment, anti-itching drugs, etc. to relieve. 1. Soap and water: infants in the mosquito bites, if only a slight redness and swelling, you can use alkaline soap and water to scrub the affected area, can play a certain role in relieving itching. 2. Antibiotic ointment: If the symptoms of redness and swelling in infants are more serious, you can use some antibiotic ointment, such as mupirocin ointment, erythromycin ointment, etc., to prevent infections and relieve the symptoms. 3. Anti-itching medication: If the infant’s redness and swelling is relatively large, or there are multiple redness and swelling, you can also use such as glycerite lotion to stop the itching and relieve the symptoms. It is recommended that parents can first use soap and water to smear the part of the baby being bitten by mosquitoes, if the symptoms have not been relieved, you should consult a doctor in time and follow the doctor’s instructions to use the medication, so as not to cause adverse consequences.