What causes sudden eye redness?

Under normal circumstances, sudden eye redness may be caused by lack of rest, allergic reactions, conjunctivitis, iridocyclitis, keratitis, or other reasons. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under a doctor's guidance. Specific analyses are as follows:

1. Lack of rest: Prolonged reading or smartphone use without sufficient eye rest can lead to eye redness. Avoid overusing your eyes, and follow medical advice for warm compresses on the eyes to help relieve eye fatigue.

2. Allergic reaction: If the eyes come into contact with allergens such as pollen or dust, an allergic reaction may be triggered, causing symptoms like itching and red rashes, along with eye redness. It is important to avoid the allergen promptly and, as directed by a physician, take medications such as loratadine tablets, cetirizine hydrochloride oral solution, or promethazine hydrochloride tablets.

3. Conjunctivitis: An inflammatory condition affecting the conjunctiva, often caused by microbial infection or external irritation. Due to inflammation, common symptoms include conjunctival redness, photophobia, and a foreign body sensation in the eye. Patients may use chloramphenicol eye drops, ofloxacin eye drops, erythromycin tablets, or similar medications as prescribed.

4. Iridocyclitis: A type of anterior uveitis potentially associated with pathogen infection or immune system dysfunction, characterized primarily by red eyes, eye pain, and blurred vision. Severe cases may result in significant eye redness. Treatment should follow a doctor’s recommendations and may include medications such as hydrocortisone acetate eye drops, tobramycin eye drops, or pranoprofen eye drops.

5. Keratitis: Often related to pathogen infection or vitamin A deficiency, this condition can cause eye pain, photophobia, and tearing. Inflammatory stimulation may also lead to eye redness. Patients should follow medical instructions for drug therapy, such as methylprednisolone tablets, acyclovir eye drops, or chlortetracycline hydrochloride eye ointment.

In daily life, maintain proper eye hygiene and avoid touching your eyes with your hands. Avoid spicy and irritating foods such as chili peppers and pepper, maintain a light diet, and reduce irritation to the eyes.