Eye pain, eye redness and eye boogers are caused by various reasons, which may include conjunctivitis, dacryocystitis, keratitis and so on. 1. Conjunctivitis: its symptoms are red eyes, eye discharge, sometimes accompanied by eye pain. When inflammation occurs, there will be inflammatory factors to stimulate the blood vessels to ooze, there will be an increase in the phenomenon of secretion, which is also known as eye boogers. 2. Dacryocystitis: the general symptoms are tearing and pus flow, there is mucus or yellow secretion overflowing when pressing the lacrimal sac area, such as acute attack can be accompanied by eye pain. 3. Keratitis: its symptoms are eye redness, foreign body sensation, photophobia and tearing, sometimes accompanied by increased secretion, accompanied by varying degrees of vision loss. Occurrence of eye pain, red eyes and eye droppings, should promptly seek medical attention, under the guidance of the doctor for treatment. Pay attention to the local cleanliness and hygiene of the eyes, often wash hands with soap, avoid rubbing the eyes with hands.