Do lizards shed their skins too?

Again, depends on the species. Once a section is ready to go, it normally pops right off rather quickly. For an adult bearded dragon, the whole process can take a few weeks. First the front legs. Then the head and neck. Then the tail. Then the back legs. Then the back. Though it is not always in a specific order.

If the animal hasn't had the proper moisture or humidity, depending on the species, when the skin rolls down the foot and the lizard tries to rip it off, it can rip at the top of the toe, and then the toe bit doesn't come off. Then the toe keeps growing, the dead skin stuck on doesn't.