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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes A Red Circular Flat Patch On Armpit?

My 14 year old son has a red circular flat patch on his armpit. It's just a little itchy and he's had it for over a week. I told him to was wash well and not wear deodorant which he has done but it hasn't gone away. He has no other patches anywhere else. Regards, Lina
posted on Fri, 14 Mar 2014
Twitter Fri, 13 Jun 2014 Answered on
Twitter Fri, 13 Jun 2014 Last reviewed on
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Dermatologist,  's  Response
Hello and welcome to healthcaremagic

I would keep a possibility of Tinea corporis/fungal infection. Axillary folds trap sweat and moisture and thus provide an ideal environment for the fungus to proliferate.

Fungal infection presents as a red scaly patch, with central clearing and peripheral extension. There is variable scaling and itching over the patch.

I would suggest a KOH scraping from the scale to confirm the diagnosis

I would suggest you to use an OTC antifungal e.g clotrimazole cream, twice daily for 4-6 weeks

An OTC antihistamine e.g cetrizine 10mg once daily would provide you symptomatic relief from itching.

I would also suggest an oral antifungal e.g fluconazole 150mg once weekly for 4-6 weeks

Regards
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What Causes A Red Circular Flat Patch On Armpit?

Hello and welcome to healthcaremagic I would keep a possibility of Tinea corporis/fungal infection. Axillary folds trap sweat and moisture and thus provide an ideal environment for the fungus to proliferate. Fungal infection presents as a red scaly patch, with central clearing and peripheral extension. There is variable scaling and itching over the patch. I would suggest a KOH scraping from the scale to confirm the diagnosis I would suggest you to use an OTC antifungal e.g clotrimazole cream, twice daily for 4-6 weeks An OTC antihistamine e.g cetrizine 10mg once daily would provide you symptomatic relief from itching. I would also suggest an oral antifungal e.g fluconazole 150mg once weekly for 4-6 weeks Regards