I am a male, 20 years old. I have a pimple under my left armpit, that I recently popped. However, now, there is a soft, red, fleshy little growth coming out from the center of the pimple. It is like a small red bump. If I squeeze it, blood and a little bit of pus come out of the small, red, fleshy lump, but the lump remains there. What could this be?