1. Conjunctivitis (Pink Eye)
Conjunctivitis, or pink eye, is inflammation of the thin membrane lining your eyelids and covering your eyeball. This inflammation could be caused by viruses, bacteria, irritating substances like makeup, or allergens. Depending on the cause, your body may produce clear, white, or thick yellow/green discharge that can harden and cause your eyelids to stick together when you wake up.
2. Keratitis
Keratitis is inflammation of the cornea, the clear front part of your eye. It can be triggered by things like infections (bacterial, viral, or fungal), irritating substances or extreme dryness. Symptoms may include pain, redness, and discharge that might be sticky or thick.
3. Blepharitis
Blepharitis is an inflammation of the eyelids that often leads to crusty discharge, as well as irritation around the eyelash margins. It can stem from conditions like dermatitis, allergies, or clogged oil glands. People with blepharitis may notice red, swollen eyelids with crusty foreign materials upon waking. This discharge can be foamy, yellow, or green, causing additional discomfort and even itchiness.
4. Stye (Hordeolum)
A stye is a painful bump on the eyelid caused by an infected oil gland or hair follicle. A lot of times, it looks like a pimple. In addition to the noticeable bump, a stye can cause yellow pus discharge from the eye, redness, and swelling in the affected area. Avoid squeezing or touching the stye to help prevent the bacteria from spreading.
5. Dacryocystitis
This condition occurs when your tear ducts become blocked, causing tears and discharge to back up and get infected. Dacryocystitis can be painful and might require medical attention.
Symptoms typically include a swollen mass near the inner corner of the eye, redness, and a sticky discharge. You may experience blurred vision as well.
6. Dry eye disease
Dry eyes happen when your eyes don’t produce enough tears. This can be caused by aging, environmental factors like allergies, or medical issues. Ironically, dry eyes can lead to excessive eye mucus. When there’s isn’t enough moisture on the surface of the eye, your body may react by producing stringy mucus as a way to compensate.