Mouth sores can have various causes, ranging in severity from 'worrying' to 'generally fatal'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose mouth sores, we could:
|Increased Folic Acid Need||19%||Unlikely|
|Chemotherapy Side-Effects||1%||Ruled out|
|Sjogren's Syndrome||0%||Ruled out|
Have you had any ulcers, sores, or red or white patches inside your mouth lasting for more than three weeks? (Mouth Ulcers / Canker Sores generally heal within a couple of weeks.)
Possible responses:→ No / don't know
→ Yes, but not now
→ Yes, barely noticeable AND lasting under 2 months
→ Yes, significant OR lasting over 2 months
→ Yes, significant AND lasting over 2 months
Mouth sores during chemotherapy are one of the most common short term side-effects.
About half of those who get lichen planus also develop mouth sores.
Sjogren's Syndrome can result in painful mouth sores due to a dry mouth and/or Candida infection.
Flat white sores can appear in the mouth and/or throat during the second stage of syphilis infection.