Infant eyelid redness and swelling, may be due to acute conjunctivitis, may also be due to localized allergies or mosquito bites and other factors. 1. Acute conjunctivitis: a kind of inflammation that occurs in the eye, will lead to the redness and swelling of the eyelids of infants, and some people will be accompanied by eye discharge and other conditions. 2. Allergy: contact with allergens, if the baby’s eyes accidentally contact allergens, there will be redness and swelling, some patients may also be accompanied by local itching, pain and other symptoms. 3. Mosquito bites: baby eyelids by mosquito bites, there will be red and swollen phenomenon, sometimes accompanied by itching and pain and other symptoms, babies often can not help but rub their eyes with their hands. There are many factors that cause eyelid redness and swelling in infants, and when infants have eyelid redness and swelling, parents should bring their infants to the doctor in time and follow the doctor’s instructions for treatment.