could it be an ulcer?

Lately I've been feeling very nauseous and feel burning in my middle abdomen. I'm 4 months post rny. Could it be an ulcer? (I have a doctor's appointment tomorrow. )

That's a possibility. Be sure to mention it to your doc. My gallbladder nausea And pain was similar and didn't radiate to the back like is common. Do you still have your gallbladder? Are you currently on a PPI?