Pimples!!

[wadih]

I need help with my sick garter snake, I am not sure if any one have a solution or treatment for this problem, but any help would be appreciated. IT is to note that this is an adult male that has been with me for more than one year.

One week ago, strange pimples started to appear on its body. The pimples grow and became hard and dry. More than 10 pimples exist now on its body. The snake still eats well and active as usual.

I do not know if this is a common sickness for garter snake or not, but i hope somebody knows how to treat the snake.