Weird Question

I know we usually talk about more serious topics in here, but this one should be a little lighter. So I spent 7 weeks in a sling when I fractured my humerus back in December. Ever since, my armpit has smelled so bad. Nothing I did for the months after coming out of the sling fixed it. Now I'm back in a sling (full labrum repair and bicep tenodesis surgery) and the smell is even worse. A very pungent oniony body odor smell. Honestly doesn't make sense because that armpit was easy to wash with my good arm, and the good arm pit smells normal even though it is hard to reach. Within hours of showering and applying deodorant the body odor smell is noticeable. Anyone else have/had this problem or know of a solution??