Itchy swollen peeling of the upper eyelid may be related to seborrheic dermatitis, contact blepharitis, bacterial infection of the ocular surface and other reasons. 1. Seborrheic dermatitis: due to more sebum overflow from the facial skin, causing facial inflammation, forming erythema and scaling in the local area, the patient is conscious of itching, the skin in the eyelid area is relatively thin, there can be oozing and swelling of the eyelid after scratching, and the hair at the eyebrow can be thinned due to scratching. 2. Contact blepharitis: eyelid skin contact with certain allergic substances can cause allergic reactions of the eyelid or eye, eyelid edema, erythema, papules or blisters appear, eye burning sensation or itching. In chronic cases, the eyelid skin is rough and thickened, with moss-like flaking. 3. Rubbing the eyes, eye surface bacterial infection can cause eyelid redness, swelling, itching, peeling. Itching, redness, swelling or peeling of the upper eyelid, seek medical attention, clarify the cause of the disease, and follow the doctor’s instructions for treatment.