Hi. Greetings. You'll need to send in photos on follow up chat or further evaluation by a dermatologist. Symptoms are suggestive of urticaria but this usually doesn't cause any black marks - unless you have been constantly scratching the area a lot and allowed skin changes to occur. Try to see what triggers the symptoms and avoid it. There's nothing more I can say with the limited info I have been provided with. Warm regards.
Answered2016-03-06 19:44:47
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