B.R.
I thought I was the only one!! I posted the same question on here when my son was a baby and didn't get a single response! Anywho, my son was the exact same way!! He had the stinkiest pits!! It was so gross. Fortunately he grew out of it. I'd say when he was about between 7-9 months old. I can't really remember now, but thankfully it stopped!!
Good luck!!