They are ulcers that appear inside the mouth or in the upper larynx area, due to a break in the oral mucous membranes, and they are the most common recurrent oral ulcer.
the reasons
Ministry of Higher Education and Scientific Research
University of Babylon
University of Baghdad
University of Technology
University of Diyala
University of Mosul
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University of Basrah
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Tikrit University
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Jabir ibn Hayyan Medical University
Al-Karkh University Of Science
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Basrah University for Oil and Gas
University of Al-hamdaniya
Northern Technical University
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The Great Emam University College
University Of Sumer
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