Me. I have armpit pain as well, no swollen lymph nodes for me either. I believe it's caused by the breast changes occurring due to hormone fluctuations. I looked up a few articles over it, but there weren't any real clear-cut explanations other than hormones. I notice that my armpits and breasts both tend to get achy at the same time, and typically are most sore when I wake up in the morning. I actually took a power nap earlier and had pit/breast pain linger for a bit afterwards. I don't remember experiencing it during pregnancy with my previous children, but definitely did while breast feeding. Pregnancy is weird lol
Re: Armpit Soreness?