Our expert says:
It is often caused by staph aureus bacteria, which lives on our skins but can cause infections if it gets into a small break in the skin. These bacteria thrives in warm humid areas, like in the groin, under the arms, in the nose. Try using antibacterial soap, and put bactroban ointment on the area as soon as you notice a pimple developing. It may also help to wear cotton underwear and avoid very tight fitting pants that may chafe.
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