Can someone try explain this to me?

I'm suffering from BO for about 2.5 years
the first year i haven't noticed a strong smell, but i sweat a lot from especially from my armpit.
after about 1-1.5 year i didn't sweat like crazy, but i started to smell bad. and it's gradually got stronger as time went by. today i can smell it all the time, and my room is always with this annoying smell.
beside trying several diets, i haven't done any change in my lifestyle. I don't know why it got stronger and what's the causes for my BO.
I wonder if anyone else had the same or similar experience?
what do you do about it? thanks everybody Tweet