Hello.
Merriam-Webster's Learner's Dictionary
like pulling teeth —used to say that something is very difficult and frustrating
▪ Getting him to make a decision is like pulling teeth. [=it is very hard to get him to make a decision]
Can I say "It is like pulling teeth getting him to make a decision"?
Thank you.
You certainly can, but I'd change the order:
Getting him to make a decision is like pulling teeth.