Sometime's uro's will shed allmost everything, but a couple of places....DO NOT pick at the skin. It is most likely a shedding taking place that is taking a bit longer. My mail's tails usually take a bit longer, sometimes will turn allmost a jet white just before it falls off....in that case the shedded skin was quite thick. To assist in the shed you can soak your uro in a very hot bath (hot to our touch) MAKE SURE to dry your uro comepletely make sure the tail is esspecially dry, as your uro can develop tail rot due to pending moisture in the whorls of the tail...I towel dry, then put a hairdryer on medium ....and hold from a distance (not to burn or hurt the uro)....works well.
~Chris~