What Causes Bloodshot Eyes?

Bloodshot is a term used to describe eyes that appear red or bloodshot due to increased blood flow in the vessels of the conjunctiva, which is the thin membrane that covers the white part of the eye. This condition can be caused by a variety of factors, including:

1. Infection or inflammation: Viral or bacterial infections, allergies, or irritants like smoke or chemicals can cause inflammation in the eyes, leading to bloodshot.
2. Dryness: Dry environments, excessive screen time, or exposure to wind and dust can cause dryness in the eyes, which can lead to bloodshot.
3. Trauma: Injury or trauma to the eye can cause blood vessels to break and leak, resulting in bloodshot.
4. Medications: Certain medications, such as antidepressants, antihistamines, and decongestants, can cause bloodshot as a side effect.
5. Medical conditions: Certain medical conditions, such as uveitis, conjunctivitis, and blepharitis, can cause bloodshot.
6. Smoking: Smoking can cause blood vessels in the eyes to constrict, leading to bloodshot.
7. Alcohol consumption: Drinking too much alcohol can cause blood vessels in the eyes to dilate, leading to bloodshot.
8. Poor eye care: Failure to properly clean and care for contact lenses or glasses can lead to bloodshot.
9. Allergies: Seasonal allergies or allergies to certain substances can cause bloodshot due to increased blood flow and inflammation in the eyes.
10. Hormonal changes: Changes in hormone levels, such as during pregnancy or menstruation, can cause bloodshot due to increased blood flow in the eyes.

If you are experiencing bloodshot eyes, it is important to see an eye doctor to determine the underlying cause and receive proper treatment. Treatment may include antibiotics, anti-inflammatory medications, or changes to your lifestyle or environment to reduce irritation and promote healing.