You do need to remove that encircling old skin off her tail. Take a warm wet face cloth, hold it around the area for a few moments to loosen the skin and then very gently using pressure on the face cloth, remove the tail tail stuck shed.

There are a couple of stickies that should be of help to you....

http://www.ball-pythons.net/forums/s...ad.php?t=28794

http://www.ball-pythons.net/forums/s...ad.php?t=74290

A small drop or two of blood is often seen around the vent area when a snake sheds.