What causes bloodshot eyes?

Bloodshot eyes may be related to staying up late, overuse of the eyes, trauma, keratitis, conjunctivitis, etc. It is recommended to promptly visit a reputable hospital for proper diagnosis, and then follow medical advice to improve the condition through general treatments, medications, or other methods. Specific analysis is as follows:

1. Staying up late: Frequent late nights deprive the eyes of sufficient rest, which can easily lead to dilation of ocular blood vessels and result in congestion. It's important to develop good sleep habits, avoid staying up late, and ensure adequate sleep duration.

2. Eye strain: Prolonged reading, writing, or similar activities can cause excessive eye fatigue, leading to dryness and bloodshot eyes. It is advisable to reasonably control screen or reading time and periodically close the eyes to rest or look into the distance.

3. Trauma: Injury to the eye, such as from impact or falling, can damage ocular tissues and cause symptoms like redness and pain. Applying a cold compress with an ice pack to the eye is recommended, as it helps constrict local blood vessels and alleviate symptoms.

4. Keratitis: Keratitis is often caused by microbial infection. Under inflammatory stimulation, symptoms such as eye redness, swelling, and pain may occur. Follow your doctor’s instructions to use medications such as methylprednisolone tablets, tobramycin eye drops, or ofloxacin eye ointment to relieve symptoms.

5. Conjunctivitis: Conjunctivitis is an inflammatory condition affecting the conjunctival tissue, commonly associated with infections or environmental irritants. Inflammation may cause dilation of conjunctival blood vessels, resulting in eye redness. Under a doctor’s guidance, medications such as ganciclovir eye drops, ofloxacin eye drops, or erythromycin tablets may be used to alleviate symptoms.

During treatment, maintain good eye hygiene and avoid rubbing the eyes with hands to prevent infection.