Mouth Ulcers : Causes & Diagnosis

Mouth ulcers are caused by many disorders which include:

  • Canker sores
  • Gingivostomatitis
  • Herpes simplex
  • Leukoplakia
  • Oral cancer
  • Oral lichen planus
  • Oral thrush

The skin lesion of histoplasmosis may also appear as a mouth ulcer.
Canker sores are more common in young adults than in children or older adults.

Tests & Diagnostics
A health care provider or dentist usually diagnoses the type of mouth ulcer, based on its appearance and location. Blood tests or a biopsy of the ulcer may be needed to confirm the cause.

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