Can you elaborate on the appearance of the skin lesion? Diagnosis of a fungal
infection would be through analysis of
the skin scrapings
under the microscope. It would be best to have it evaluated by a dermatologist to rule out other causes. Treatment of hyperpigmentation may include hydroquinone, kojic acid, azelaic acid, ascorbic acid, tretinoin, topical glucocorticoids, and licorice extract.
Take care and keep us posted.