Why do I smell after washing?

[RedToast]

This is driving me insane! I'm 32 years old, never smelled "bad" before.

I've noticed my underarms have been smelling of BO over the last few days -- not envy.

So, last night I had a bath and made sure to clean VERY WELL. Then I had a shower this morning and again made sure I was super clean. I put on a freshly washed bra and a brand new top.

While I was drying my hair, so about 30 minutes later, I noticed a BO smell from my underarms. WTF?

Does anyone have any idea what could be causing this? And so quickly? It's so weird.

And yes, old tshirts that are tight under the Arm aren't good. Sometimes you can't wash the smell out.