漏拆 - Meaning & usage?
First of all, "There's stitches left behind (not removed) in my mouth, what should I do?" is a good translation. 

Yes,漏 can modify other verbs. It means someone forgot to do something or some action has been missed.

Example:

A:"How you feel about the question 31 in the exam?"

B:"OMG, I didn't notice there was a question 31!"

A:"刚才考试第31题做的如何？"

B:"天啊！ 我漏做了!"