Dark skin discoloration and peel on fingers

Hi there.  I'm noticing a skin discoloration on my fingers for the past two weeks. Skin is darker than other parts/.  One part of it on my index finger has even peeled off. There is no pain or discomfort and I live in a warm climate so this is not cold related.  This is also not a bruise.  Any thoughts on what this might be or if i should be worried?  Cancer sign?

 it can be from infections, and very similar to acanthosis nigricans

See a dermatologist. 

thanks