Small amounts of dried mucus or “sleep” in the corners of the eyes on waking are normal, as the eye clears debris overnight. Excessive or sticky mucus indicates irritation or disease.
Reasons for Increase
Blepharitis, dry eye, allergic conjunctivitis, and mild viral infections commonly produce extra mucus that accumulates during sleep. Bacterial conjunctivitis causes thicker discharge that can glue the lids together.
- Overnight incomplete lid closure can dry the surface and trigger mucus production
- Contact lenses worn too long or left in overnight can irritate the eye
- Environmental irritants and poor hygiene contribute to lid margin inflammation
- Blocked tear ducts may cause recurrent morning stickiness
When to Be Concerned
Persistent, worsening, or unilateral mucus with redness, pain, or vision change should be assessed. Gentle lid hygiene and lubricants may help with mild cases.
- Cleaning lids with recommended wipes removes crusts safely
- Infectious conjunctivitis may need topical antibiotics or antiviral care
- Allergic causes respond to anti‑allergy drops and avoidance of triggers
- Infants with sticky eyes may require tear‑duct assessment
