See below: Need more information. Black color would indicate a serious problem and possible gangrene. I do not think this is what you are referring to.
Answered 4/4/2013
5.2k views
Soap and water: Really? I need a bit more info like how long its been black, how did it start and probably a picture to give some sort of reasonable answer.
Answered 3/23/2015
5.2k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
6 doctors weighed in across 3 answers
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