IN MY last article I discussed common causes of facial pigmentation. Now I will discuss relatively rare causes of pigmentation before going into the treatment options. If you are overweight, you are likely to have a dark velvety patch behind your neck and underarms. Sometimes it can extend to your forehead and around the eyes. This condition, though harmless in most cases, has a long and scary name called ‘Acanthosis Nigricans’ (AN).
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