Take this for what it's worth. I saw a Facebook reel with a woman who, I think, does lymphatic drainage, and she said something happens in the left armpit that leads to body odor. Let me see if I can find it.

One armpit only for me too

I did read about a woman for whom this was a breast cancer symptom. I’m sure that’s not the most likely outcome, but do your self exams and screenings and ask your doctor

I have actually never smelled both to check? Interesting.

I am left handed and only my left armpit gets BO and my right does not. It has been this way for as long as I can remember.

Apocrine glands. Perhaps more than other side and lopsided.

Yep. I assumed it was lymphatic related (mine is right pit). It’s my dominant hand too. Maybe that’s it.

yes I have had this intermittently for about 30 years. no abnormal mammograms and a clean breast MRI

its a thing

Mammogram more than a year ago, everything was normal

Have you had a mammogram recently? Lymph nodes checked by doctor?

Usually it's just one that has an odor but I always apply antiperspirant to both

Question for females: Do you ever experience body odor coming for one armpit only? I am wondering if this is related to hormones because it seems to be more prevalent closer to ovulation. It is only in my left armpit.