Answer (1 of 3): I have read in some of your previous questions that you are concerned about your weight. I am not a doctor but, it sounds like what you are dealing with might be something known as, Acanthosis Nigricans, a condition that can turn the elbows, knees, back of your neck, and even you
Dark Inner Thighs: Causes, Home Remedies, Prevention, and More
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Worried about dark inner thighs? Know the causes, home remedies
2 EASY STEPS TO GET RID OF DARK INNER THIGHS AND PRIVATE AREAS
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Dark Inner Thighs: Causes And Treatments