Likely sweat,,: These are areas where sweat/perspiration accumulates and do are ready areas for acne, and the like. A good thing to try at first after thorough washing and drying is an antiperspirant to keep the areas dry. Slightly looser clothing can also help if possible. If these don't solve this or help it'd be smart to see your doctor/a skin doctor for an exam to rule out done other cause. Best of luck.
Answered 5/2/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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