A child’s eyelid suddenly swollen, may be due to mosquito bites or granuloma. 1. Mosquito bites: In addition to swelling, the symptoms caused by mosquito bites can also be accompanied by an itchy feeling. Avoid scratching the eyelids after being swollen by mosquito bites, and use iodine pomade to smear the eyelids locally, or erythromycin ointment and other medications. 2. granuloma: sebaceous glands of a suppurative inflammation, the main symptom is the eyelid local redness, swelling and heat pain, may appear in the center of the swelling of yellow pus, some patients will also appear in the whole body of the fever, the main treatment is antibiotic treatment, can use erythromycin and other drugs. Children with one eyelid suddenly swollen, should promptly seek medical attention, the doctor to decide the treatment and the use of drugs.