Underarm Stank

Ladies for some reason my underarms be really smelly. Even after I scrub and scrub it still there. I'm not sure what to do i use my husband's old spice deoderent but it goes away after a hour or two. After showering my husband still smells it. What can I do to stop the smell and what's a good deodorant? What's the name of the toms deoderent scent?