Skin discoloration in fingers/toes

evil_fishevil_fish evil has arrived PExer
The skin in the joints near my nails (both toes and fingers) are dark and thick. I have tried scrubbing them really hard but it does not seem to go away. Worse, it gets too sore and painful after a hard scrub. Sometimes, that area becomes too dry and i can easily peel away dead skin. I wonder what cause these..is it hereditary? I notice that my father has the same dark and dirty looking fingers/toe. :confused:
Failed to load the poll.
Failed to load the poll.