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 immediately treated with flushing of the eyes and possibly medical intervention.
- Rare diagnoses
- Chlamydial conjunctivitis: This is a less common cause of conjunctivitis, often seen in newborns (inclusion conjunctivitis) or adults (adult inclusion conjunctivitis), and requires specific antibiotic treatment.
- Fungal conjunctivitis: This is rare but can occur, especially in immunocompromised individuals or after trauma to the eye with a vegetable matter. It requires antifungal treatment.