The patient’s skin under the eyes is particularly itchy, which may be caused by contact blepharodermatitis, mosquito bites, etc. It may also be related to blepharitis, allergic conjunctivitis, and dry eye. If the patient’s eyelid skin comes into contact with external allergens, such as pollen, cosmetics, hair, etc., contact blepharodermatitis is likely to occur, and the patient may experience itchy eyelid skin. In addition, if the patient’s eyelids are bitten by mosquitoes, the patient may also experience the discomfort of itchy eyelid skin. If chronic inflammation occurs on the surface of the eyelid margin, eyelash follicles and the surrounding glandular tissues, under the stimulation of inflammation, such as blepharitis, patients may experience itchy eyelids and other uncomfortable symptoms. Allergic patients exposed to external allergens, can also cause allergic conjunctivitis, patients can appear itchy eyes and other discomfort, patients can also appear eyelid swelling and other discomfort. It is recommended that patients with obvious itchy eyes consult a doctor promptly to assess their condition and follow the doctor’s instructions for treatment.