A red, crusty eye usually signals irritation, infection, or dryness. Common causes include bacterial or viral infections, allergies, or blocked oil glands. Treatment depends on the underlying issue.
Your eyes produce tears to stay moist and healthy. When something disrupts this balance-like an infection or allergy-your eyes may become red, inflamed, and crusty. Bacteria or viruses can cause infections, while allergens trigger inflammation. Dry eye occurs when your eyes don't produce enough tears or when tears evaporate too quickly.
The most common causes of a red, crusty eye include:
Most cases of red, crusty eyes resolve on their own or with basic care. However, see a doctor if:
Persistent symptoms may indicate a more serious condition, such as a corneal ulcer or severe dry eye.
Many people assume red, crusty eyes are always contagious. While bacterial conjunctivitis spreads easily, viral conjunctivitis and allergies are not contagious. Another myth is that rubbing the eyes helps-this often worsens irritation and can introduce more bacteria.
I once had a red, crusty eye that wouldn't go away. After trying over-the-counter drops, I visited a doctor who diagnosed blepharitis. Warm compresses and antibiotics cleared it up within a week.
To reduce the risk of red, crusty eyes: