Eyelid allergies, more commonly known as contact dermatitis. There is also eczema of the eyelids. Contact dermatitis is an inflammatory reaction that occurs when the skin comes into contact with an external substance. Often eye cosmetics or hair dyes, detergents, and various medications that come into contact with the eye can be the allergen that causes the allergy. Eyelid eczema is a common allergy-related skin condition, as the cause is complex and the allergens are not always identified. The onset of the flare-up may usually have a history of chemical exposure, and the skin of the eyelids feels distinctly itchy, burning, and tingling. The eyelid skin appears visibly red and swollen, or has red papular patches, severe erythema and swelling, blistering vesicles and oozing, etc. For treatment, the first consideration is to try to find the allergenic source and avoid re-exposure. Localized cold wet compresses of boric acid water and topical application of anti-allergic eye ointment can be considered 2 to 3 times a day. Various anti-allergy medications, such as antihistamines, can be taken orally throughout the body. If the condition is severe, hormonal medication can be considered as appropriate, but prolonged use is not recommended.