- Sty (hordeolum)
A stye is a tender, pimple-like red bump on the eyelid caused by a bacterial infection.
- Allergic reaction
Allergic reaction causes sneezing, runny nose and hives and can lead to anaphylaxis, a whole body reaction.
- Corneal abrasion (scratch)
A corneal abrasion is a scratch on the clear part of the eye and causes watery bloodshot eyes, pain, and more.
- Indoor allergens
Indoor allergens are the things that cause an allergic reaction: dust, dust mites, mold, pet hair and more.
- Hay fever
Hay fever, an allergic reaction to outdoor pollens and molds, causes nasal congestion, itchy eyes, and more.
- Eye injury
There are many types of eye injury, and symptoms include eye pain, burning, irritation, bleeding, and more.
- Stuck eyelash
Getting an eyelash stuck in the eye may cause itchiness, stinging, redness, or blurry vision in one eye.
- Rosacea
Rosacea is a skin condition that causing redness, broken blood vessels, a rash, or thickened skin on the face.
- Foreign object in the eye
Symptoms of a foreign object in the eye include pain, stinging, itchiness, redness, tearing, bleeding, and more.
- Abscess
A skin abscess, or boil, is a swollen, painful, red and warm lump of skin that may rupture and drain pus.
- Eye allergies
Eye allergies, or allergic conjunctivitis, can make your eyes itchy, red, and watery.
- Chagas disease
Chagas disease is caused by a tropical parasite and can cause fever, ill feeling, and swelling around the eye.