Brown marks have appeared under my armpits and breasts, and I can’t seem to get rid of them. I tried off-the-shelf Canesten, which I was told could help – but it didn’t. I’m in my 30s, healthy and it’s really getting me down. I heard it could be a sign of prediabetes.
B Murray, Bicester.
Dr Martin Scurr replies: I am sorry to read of your distress, but I think there are good options for you. What you describe sounds like one of two possible conditions, erythrasma or acanthosis nigricans.
Erythrasma is the most likely: This is a common skin infection typically affecting
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