My baby has a red bump on his stomach. Started out a few days ago as a small red bump, like a bite or pimple, then formed pus on tip, now pus is gone, and there is a hole, but the area around is red and swollen, and there's a lump under it. The redness around the hole is the size of a quarter. I put court aid, and pimple cream on it the other day. I hope I didn't make it worse. Today I just washed it with warm water. No fever, scratching, of anything.