Hard to speculate: This may have started off as a simple reaction to something you came in contact with. If it has persisted this long it may be what is labeled a neurodermatitis, a fancy label for changes that occur if you itch & scratch producing more itching & scratching. It may respond to an otc hydrocortisone cream and your willful effort to avoid scratching for a couple months. Your doc may need to see it.
Answered 6/27/2017
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2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
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