This description sounds like acanthosis nigricans. This is a condition where your skin folds like underarms, neck and face becomes dark. It is either genetic or due to sedantry lifestyle and overweight. This can be treated. Please contact me with photos using online consult option for proper diagnosis, treatment advice and prescription. This is not due to dirt and rubbing the neck will make it darker.
Answered2017-06-13 03:55:02
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