[MichelleM]

I just got an extremely painful lump under my armpit, it's more like a big pimple, it's super red and painful. It's freaking me out, it came so suddenly and it hurts when I move my arm. I google it and some brush it off as a normal no biggie just a blocked pore or infected lymph node and others are saying it's cancer. The more I research it the more it freaks me out. I don't shave, I wax so I doubt it's ingrown hair as some suggest.

If it eases your mind at all, I've actually had ingrown hairs, fitting your description, in areas where I don't shave. So, it's possible that it might just be an ingrown hair. Because of the extra irritation (friction from rubbing) from being under your armpit, it's also possible to come on suddenly and be pretty painful.

You might try warm moist compresses to see if it helps.

I hope that helps, and that you feel better soon!

Michelle