over the last few weeks. I have been getting stinky night sweats. Never had it happen before at any point in my life. I am 41 years old. Is this the beginnings of that old people smell? Do I have a liver, kidney, or thyroid issue?

It's kind of a sour vinegary smell and only happens around my chest area when I sleep at night.

It doesn't happen when I exercise, only sleeping.

Is this something to be concerned about?