Can snakes regenerate

If a snake gets any section of it's body cut off it will die. The exception to this is if the tail gets cut off, but this has to be behind the cloaca, and with males, even further back; as their hemipenes are stored in the tail, just behind the cloaca. If a snake loses it's tail it will heal, but with only a nub for the rest of it's life. Snake tails do not grow back. So, no, it will not grow its head back.

Hope this helps :]