Need advice on getting rid of sweat odor after shunt replacement surgery

I had a total shunt replacement of my one shunt near the end of feb. but now I noticed something odd. Ever since I had my surgery and I was released and allowed to come back home. I make sure to take a good shower about every other day because if I do it every day my skin dries out and itches really bad so I do it every other night. But even though I make sure that I use a good deodorant. I noticed that my under arms are still sweat smelling. I was wondering what I would be able to do to help get rid of the odor. I have to watch what kind of deodorant It use because my under arms get sore easily.