How does a snake shed its skin?

7, WI — Lauren, The scientific name for this process is called "ecdysis," and snake do it to help grow and get rid of any parasites on their body. In order to help to get rid of their old skin, snakes sometimes swim to loosen it. Next, they rub their mouth on a rock or other hard surface to create a rip in the old skin. Then, the snake slithers out of the old skin until it's completely off. They sched between two four times a year!