Kimb
You did not mention if it hurts or not. It is most likely a swollen lymph node. It most likely gets clogged and and more swollen after you shave and put on deoderant. This is VERY common, but scary nonetheless!!! The first time this happened to me my doctor suggested I not use deoderant for a few days. Use baking soda, which really does work just as good. Also a heating pack or pad to help the swelling go down. Call your doctor and report the problem! No matter what it "is", it should be checked out. Good Luck!!!