Differential Diagnosis for Pink Eye
- Single most likely diagnosis
- Viral conjunctivitis: This is the most common cause of pink eye, often presenting with redness, itching, and discharge in one or both eyes. It is highly contagious and usually resolves on its own.
- Other Likely diagnoses
- Bacterial conjunctivitis: This condition is also common and presents with similar symptoms to viral conjunctivitis but often has a thicker, more purulent discharge. It may require antibiotic treatment.
- Allergic conjunctivitis: This occurs in response to an allergen and is characterized by itching, redness, and tearing, often accompanied by other allergic symptoms like sneezing or a runny nose.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Gonococcal conjunctivitis: Although less common, this condition can lead to serious complications, including vision loss, if not promptly treated with appropriate antibiotics. It is particularly concerning in newborns.
- Herpes simplex keratitis: This viral infection can cause severe inflammation of the cornea and, if not treated, can lead to vision loss. It requires antiviral medication.
- Chemical conjunctivitis: Exposure to certain chemicals can cause severe conjunctivitis and potentially lead to long-term vision problems if not properly managed.
- Rare diagnoses
- Chlamydial conjunctivitis: Caused by the bacterium Chlamydia trachomatis, this form of conjunctivitis can be sexually transmitted and requires specific antibiotic treatment.
- Fungal conjunctivitis: This is a rare but potentially serious condition, often associated with trauma to the eye or immunocompromised states, requiring antifungal treatment.