What causes bloodshot eyes?
Eye redness may be caused by factors such as eye strain, dry eyes, conjunctivitis, keratitis, or glaucoma. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate treatment under the guidance of a qualified physician. Specific analyses are as follows:
1. Eye Strain
Prolonged use of the eyes—such as staying up late or spending extended periods looking at mobile phones—can lead to tension in the eye muscles, resulting in poor ocular blood circulation and subsequent eye redness. It is advisable to adjust eye usage habits: take regular breaks, look into the distance periodically, or enable eye-protective modes when using electronic devices, which can help reduce eye fatigue.
2. Dry Eyes
Dry environments or prolonged wear of contact lenses may lead to dry eyes, causing eye redness. It is recommended to maintain appropriate indoor humidity, replace contact lenses regularly, or use artificial tears and other eye moisturizing products to alleviate discomfort.
3. Conjunctivitis
This condition is usually caused by infections from pathogens such as bacteria or viruses. After local inflammation develops, patients may experience symptoms including eye redness, increased discharge, and excessive tearing. Patients should follow medical advice and use medications such as chloramphenicol eye drops, ganciclovir eye drops, or ofloxacin eye drops for treatment.
4. Keratitis
Keratitis may be associated with microbial infection, malnutrition, and other factors. Common symptoms include eye redness, pain, and tearing. Patients are advised to follow medical instructions and use antiviral or anti-inflammatory eye drops such as acyclovir eye drops, natamycin eye drops, or cyclosporine eye drops for treatment.
5. Glaucoma
This may be related to inappropriate medication use or elevated intraocular pressure. Common symptoms include eye redness, blurred vision, and eye pain. Patients should use medications such as pilocarpine nitrate eye drops, mannitol injection, or travoprost eye drops under a doctor's supervision to manage symptoms.
In daily life, it is recommended to maintain good eye hygiene, avoid rubbing the eyes, refrain from strenuous exercise, ensure sufficient sleep, and avoid staying up late, all of which are beneficial for recovery.
