Bloodshot eyes occur when the tiny blood vessels on the surface of the whites of the eyes become swollen and fill with blood, leaving the eyes looking red and bloodshot. There are many possible causes of bloodshot eyes, including:
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Allergies: Pollen, dust, mold, pet dander, and other allergens can cause bloodshot eyes.
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Irritants: Irritants such as chlorine from swimming pools, cigarette smoke, perfumes, and other chemicals can cause bloodshot eyes.
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Dryness: Short-term or long-term dryness can cause bloodshot eyes. Over-the-counter artificial tears can help keep the eyes lubricated and healthy.
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Infection: Viral or bacterial infections can cause red eyes. Fungal eye infections are less common.
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Injury: An injury to the eye can cause blood vessels to dilate and cause redness.
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Fatigue: Lack of sleep or eye strain from staring at a computer screen for long periods can cause bloodshot eyes.
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Contact lenses: Wearing contact lenses for too long or using the wrong contact lens solution can cause bloodshot eyes.
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Other medical conditions: High blood pressure, conjunctivitis, and other medical conditions can cause bloodshot eyes.
To treat bloodshot eyes, it is important to identify and address the underlying cause. Home remedies such as applying a cold compress, using over-the-counter eye drops, and avoiding irritants can help relieve symptoms. If symptoms persist or are accompanied by pain, vision changes, or other serious symptoms, it is important to see a healthcare provider for diagnosis and treatment.
