Differential Diagnosis for Pain Inner Canthus Both Eyes

• Single most likely diagnosis
  • Dry eye syndrome: This condition is a common cause of eye discomfort and pain, especially in the inner canthus area, due to insufficient tear production or poor tear quality.
• Other Likely diagnoses
  • Blepharitis: Inflammation of the eyelids can cause pain and discomfort in the inner canthus, often associated with redness, itching, and swelling.
  • Conjunctivitis: Infection or inflammation of the conjunctiva can lead to pain and discomfort in the eyes, including the inner canthus area.
  • Sinusitis: Sinus infections can cause referred pain to the eyes, including the inner canthus, due to the proximity of the sinuses to the orbital area.
• Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
  • Orbital cellulitis: A serious infection of the orbital tissues that can cause severe pain, swelling, and vision changes, requiring prompt medical attention.
  • Cavernous sinus thrombosis: A rare but life-threatening condition that can cause pain and swelling in the eyes, including the inner canthus, due to a blood clot in the cavernous sinus.
  • Temporal arteritis: Inflammation of the temporal arteries can cause severe headaches, jaw pain, and eye pain, including the inner canthus, and can lead to vision loss if left untreated.
• Rare diagnoses
  • Sjögren's syndrome: An autoimmune disorder that can cause dry eye syndrome, but also other systemic symptoms, and can be associated with pain in the inner canthus area.
  • Trigeminal neuralgia: A rare condition that affects the trigeminal nerve, causing severe, stabbing pain in the face, including the eyes and inner canthus area.
  • Ocular migraine: A rare condition that can cause pain and visual disturbances, including pain in the inner canthus area, often accompanied by migraine headaches.