What should I do if there are red blood vessels in my eyes but no pain or itching?

Red blood vessels in the eyes without pain or itching should be treated based on the underlying cause. This condition is usually caused by eye strain, dry eye syndrome, conjunctivitis, and similar factors.

1. Eye strain: If caused by excessive eye use, treatment may include cold compresses. Medications such as polyvinyl alcohol eye drops or brinzolamide-dorzolamide eye drops may also be used under a doctor's guidance. Additionally, patients should get adequate rest, avoid overusing their eyes, and ensure sufficient sleep.

2. Dry eye syndrome: If caused by dry eye, warm compresses can help reduce redness in the eyes. Under medical advice, medications such as acyclovir eye drops or cyclosporine eye drops may be used to improve symptoms.

3. Conjunctivitis: If caused by conjunctivitis, cold compresses can help relieve discomfort. In cases of bacterial infection, it is recommended to use antibiotics such as levofloxacin eye drops or tobramycin eye drops under a doctor’s guidance. For viral infections, antiviral medications such as acyclovir eye drops or ganciclovir eye drops should be used as prescribed.

In addition, conditions such as keratitis and uveitis may also cause this symptom. It is recommended to visit a hospital for examinations such as slit-lamp microscopy and complete blood count to determine the exact cause and receive appropriate treatment accordingly.