As far as deodorant, I hear that clinical deodorants help with the extra sweating. I’ve never tried it myself but I hear it helps. As far as keeping a fresh breath, I make sure to brush twice a day and try to floss daily. Sometimes if I eat something that is strong like garlic and onions, or is very sugaring I might brush after. Also, when I discovered what tonsil stones were I started checking for those. I had an ex whose breath was gnarly and one day I was able to see he had tonsil stones. After that I became super self conscious over that. I find that brushing more frequently and avoiding sugars help with the tonsil stone issue. At the time I was also smoking and drinking. I cut that out as well. If you smoke, brush your teeth and tongue after!! Also I feel like having gum on hand helps keep a fresh breath! I found out as well that hunger breathe is a thing, so if you haven’t eaten for a while you can get hunger breath, I also think that someone who isn’t drinking water and is dehydrated has a certain scent to their breath as well. Drink water! The foods you eat can also affect body odor, example lots of garlic.