The excess sweat and smell under the arms are not unusual, but it is unpleasant for everyone.
If you want to use natural products and not chemical ones (since you probably tried anything on the market and still the odor is present), read this article to find out more.
Here are a few remedies that are natural 100% and will solve your problem:
Baking soda- this is used also for fridges or laundry deodorizer, so if it can refresh those things, you can use it on armpits too. It is gentle, natural and cheap.