Pimple-like sore under breast after reduction mammoplasty 1 month ago, should I be worried?

I had a breast reduction a little over a month ago. I’m concerned about something under my breast, right below the incision. It was red and had a white tip, I squeezed it and just a tiny bit of soft white stuff came out. It’s not painful at all, but a lot of blood came out after. I washed it w antibacterial soap and it has a bandaid over it now. Could it just be a buildup of sweat/dead skin in a pore? It is hot where I live.