Patients with itchy eyelids and edema after scratching may be caused by allergic blepharodermatitis and blepharitis.
Allergic blepharodermatitis is a common allergic disease of the skin of the eyes. If the eyelids of allergic patients come into contact with allergens such as skin care products, shampoos, hair dyes, cosmetics, and other allergens, triggering an allergic reaction, it can lead to allergic blepharodermatitis, and the patient can experience eye itching and other discomforts. If the patient scratches the eyelids, the allergic reaction can be further aggravated, resulting in eyelid edema.
Blepharitis is a chronic bacterial infection that occurs in the eyelid area. Under the stimulation of inflammation, patients may experience discomfort such as itching and burning of the eye, and scratching may cause edema of the eyelid due to mechanical stimulation.
It is recommended that patients with itchy eyelids and obvious edema should consult a doctor promptly to assess their condition and choose the appropriate treatment under the guidance of the doctor.