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Your health care provider can often make the diagnosis by looking at the sore. If canker sores persist or continue to return, tests should be done to rule out other causes, such as erythema multiforme, drug allergies, herpes infection, bullous lic...
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Canker sores are diagnosed by observation of the blister. A distinction between canker sores and cold sores must be made because cold sores are infectious and the herpes infection can be transmitted to other people.
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A distinction between canker sores and cold sores should be made because the latter is infectious. Other disorders of the mouth may need to be ruled out as well; a skin lesion biopsy may be required for further diagnosis.
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Canker sores are diagnosed by observation of the blister, which generally appears in the mouth or throat. Canker sores are bacterial infections and not contagious.Recurrent canker sores may indicate a metabolic imbalance, dietary deficiency, stres...
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During a physical examination, a health care provider studies a patient''s body to determine the presence or absence of physical problems.
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