The redness of the patient’s eyelids may be caused by granuloma, eye allergies, and may also be related to mosquito bites and other factors. 1. Eyelid swelling: Eyelid swelling can be stimulated by inflammation, redness, swelling, burning and other symptoms of discomfort in the affected area of the eyelid, the eyelid can also appear hard nodules, accompanied by pressure and pain and other discomforts. Eyelid swelling is often caused by poor eyelid hygiene and bacterial infections. 2. Eye allergy: allergic patients eat or contact with allergens, resulting in redness and swelling of the eyelids, patients may also be accompanied by itchy eyes and other uncomfortable symptoms. 3. Mosquito bites: After being bitten by mosquitoes, patients will experience redness, itching and other uncomfortable symptoms. Patients need to avoid scratching, otherwise it can lead to the patient’s eye discomfort symptoms worsen. It is recommended that patients with severe redness and swelling of the eyelids consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.