Conjunctivitis is usually an infection or inflammation of the outer layer of the eye (or the conjunctiva). It can occur if you have a cold or have been near someone with a cold. It is very common and often starts in one eye but then spreads to the other. Conjunctivitis is not usually serious, but it can affect both eyes and can be passed from person to person. Viral conjunctivitis will go away by itself in one to six weeks. Yellow pus may be a sign of infection by bacteria.
Signs and symptoms:
The most common pink eye symptoms include:
- Redness in one or both eyes
- Itchiness in one or both eyes
- A gritty feeling in one or both eyes
- A discharge in one or both eyes that forms a crust during the night that may prevent your eye or eyes from opening in the morning
- Tearing
Symptoms suggestive of a more severe eye infection include:
- Severe eye pain
- Change in vision
- Extreme sensitivity to light
- Marked heat & swelling of eyelids
When to see a doctor?
There are serious eye conditions that can cause eye redness. These conditions may cause eye pain, a feeling that something is stuck in your eye (foreign body sensation), blurred vision and light sensitivity. If you experience these symptoms, seek urgent care.
People who wear contact lenses need to stop wearing their contacts as soon as pink eye symptoms begin. If your symptoms don't start to get better within 12 to 24 hours, make an appointment with your eye doctor to make sure you don't have a more serious eye infection related to contact lens use.
https://health.maryland.gov/phpa/IDEHASharedDocuments/conjunctivitis.pdf
https://www.wikidoc.org/index.php/Conjunctivitis_(patient_information)
https://patient.info/eye-care/eye-problems/infective-conjunctivitis