Itchy sensation on the patient’s eyelids may be caused by contact blepharodermatitis, eyelid eczema or blepharitis. 1. Contact blepharodermatitis: When the patient has an allergic reaction to sensitizers such as drugs (e.g. atropine, trichothecenes), cosmetics, frames, etc., the patient’s eyes may itch and burn, and the patient’s eyelids may also appear red and swollen. 2. Eyelid eczema: under the action of internal and external factors, if the patient’s eyelid area has eczema, the patient’s face or other parts of the body can also have eczema, the patient can have eyelid itching and other discomforts, and there can be oozing after scratching. 3. Blepharitis: if the patient’s eyelid margin localized oval dermatophyte infection or long-term use of poor-quality cosmetics and other induced blepharitis, the patient may appear itchy, tingling and other discomforts, the patient may also appear eyelid margin area redness, congestion and other symptoms. It is recommended that patients with significant eyelid itching should seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.