What causes dry and itchy eyes?

Under normal circumstances, dry and itchy eyes may be caused by eye strain, dry eye syndrome, blepharitis, uveitis, or conjunctivitis. When experiencing the above symptoms, timely medical consultation and treatment are recommended. Specific analysis is as follows:

1. Eye strain: Prolonged use of the eyes can lead to eye fatigue and increased evaporation of moisture from the ocular surface, resulting in dryness and itching. It is advisable to rest the eyes by closing them periodically and avoid excessive eye use.

2. Dry eye syndrome: This condition arises from insufficient tear production or excessively rapid tear evaporation, leading to inadequate lubrication of the eye surface and causing dryness and itchiness. Treatment may include medications such as Jinzhen eye drops, sodium hyaluronate eye drops, or fluorometholone eye drops, as recommended by a physician.

3. Blepharitis: Blepharitis may result from bacterial infection or dysfunction of the oil glands, potentially causing dryness and itching of the skin around the eyelids, thereby affecting eye comfort. Symptoms may be relieved with medications such as levofloxacin tablets, tetracycline hydrochloride capsules, or erythromycin eye ointment, as directed by a doctor.

4. Uveitis: Uveitis is an inflammation of the uvea caused by infection, autoimmune response, or other factors. It commonly leads to uveal congestion and edema, producing inflammatory mediators that stimulate nerve endings in the eye, causing itching, pain, and other discomforts. Treatment may involve medications such as dexamethasone acetate tablets, diclofenac sodium sustained-release tablets, or indomethacin sustained-release capsules under medical supervision.

5. Conjunctivitis: Conjunctivitis can cause conjunctival redness, swelling, and excessive discharge. These secretions and inflammatory mediators may irritate the eyes, leading to itching, pain, and discomfort. It is recommended to follow medical advice and use medications such as chloramphenicol eye drops, erythromycin tablets, or ofloxacin eye drops to alleviate symptoms.

In daily life, consuming foods rich in vitamin A—such as carrots, sweet potatoes, and spinach—can help support eye health.