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General
Black piedra, also known as trichomycosis nodosa, refers to a fungus infection of hair shafts, causing small black, firm, irregular nodules. If the nodule is dark, the infection is called black piedra. It is more common in middle aged people, usually due to poor hygiene.
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Signs & symptoms
Symptoms include firmly adherent, black, firm, oval or elongated papules, composed of a mass of fungus cells; scalp most common site of involvement, but also seen in the beard, mustache and pubic areas
Diagnosis
Diagnosis is based upon findings from medical history and physical examination. Further evaluation may include trichoscopy, direct microscopic examination, fungal culture and histopathology.
Treatment
Treatment includes antifungal shampoos and creams.
Note
☝ We provide information on prescription and over-the-counter medicines, diagnosis, procedures and lab tests. This material is provided for educational purposes only and is not medical advice, diagnosis or treatment.
National Institutes of Health ∙ World Health Organization ∙ MedlinePluse ∙ Centers for Disease Control and Prevention
☝ All information has been reviewed by certified physicians from Alike
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