What causes itching at the corner of the eye?

Itching at the corner of the eye may be caused by allergic conjunctivitis, dry eye syndrome, blepharitis, keratitis, dacryocystitis, or other conditions. Seek medical attention promptly to determine the underlying cause and receive targeted treatment under a doctor's guidance. Specific analyses are as follows:

1. Allergic conjunctivitis: This is an inflammatory reaction of the conjunctiva triggered by allergens. Individuals with allergic constitutions may develop allergic conjunctivitis upon exposure to allergenic substances. When these substances irritate the corner of the eye, itching occurs. Other symptoms may include burning sensation, foreign body sensation, and increased secretions. Treatment may include medications such as ketotifen fumarate tablets, levocetirizine hydrochloride capsules, or loratadine tablets, taken as directed by a physician.

2. Dry eye syndrome: A condition caused by dysfunction of the tear film. Individuals with先天性 tear deficiency (congenital insufficient tear secretion) may develop dry eye syndrome. Lack of sufficient tears can lead to dryness and itching at the corner of the eye. Additional symptoms may include redness, photophobia, and blurred vision. Treatment options under medical supervision may include sodium hyaluronate eye drops, compound mannitol injection, or acetylcysteine eye drops.

3. Blepharitis: An inflammatory condition of the eyelid margin caused by various factors. Excessive sebum production from the eyelid glands may block hair follicles, leading to blepharitis. Increased secretions from blocked follicles may become infected with bacteria, resulting in itching at the corner of the eye. Other symptoms include redness, loss of eyelashes, and eye pain. Medications such as doxycycline hydrochloride tablets, ivermectin tablets, or metronidazole tablets may be used as prescribed by a doctor.

4. Keratitis: An inflammatory disease of the cornea caused by various factors. Prolonged use of contact lenses may increase the risk of bacterial infection, triggering keratitis. Inflammation causes corneal congestion, which may present as itching at the corner of the eye. Common accompanying symptoms include decreased vision, blurred vision, and excessive tearing. Under medical guidance, treatments may include ribavirin tablets, valacyclovir hydrochloride tablets, or roxithromycin dispersible tablets.

5. Dacryocystitis: An inflammatory condition caused by obstruction of the tear ducts. Narrowing of the nasolacrimal duct may block tear drainage, leading to dacryocystitis. Accumulated secretions in the obstructed tear duct can cause itching at the corner of the eye. Other symptoms include excessive tearing, redness, and swelling. Treatment under medical supervision may involve gatifloxacin eye drops, chloramphenicol eye drops, or pranoprofen eye drops.

Maintain good eye hygiene and ensure adequate rest. Avoid rubbing the eyes, as this may hinder recovery.