There are many causes of eyelid swelling, such as blepharitis, allergies, kidney diseases, etc., which can lead to swelling in the eyelid area. 1. Blepharitis: acute suppurative inflammation of the eyelid glands, usually caused by staphylococcal infections, can lead to redness, swelling, heat and pain in the eyelid area. 2. Allergy: when the patient’s eyelid area accidentally comes into contact with certain allergic substances, such as cosmetics, chemicals and animal hair, etc., it can lead to local allergic reactions, which can cause local skin swelling, pain and other uncomfortable symptoms. 3. Kidney disease: When patients have acute and chronic nephritis, it can affect the kidney’s excretion of water, which can cause water retention in the body, leading to edema in the patient’s body, and the eyelid area can also appear edema. In addition, sleep deprivation, heart disease, idiopathic neurovascular eyelid edema, etc., can lead to eyelid swelling, so it is best to go to the hospital in a timely manner to consult and identify.