You have cellulitis - inflamation of the cells. You need an antibotic to heal this. Mine started in my armpit also, others popped up also. Very painful, went to doctor he said not to pop them, Within 3 days of taking Bactrim antibotic, they were gone. Hope this helps.
I have the same thing happen to me. in my case its hidradenitis suppurativa, I scrub myself really well in the areas im prone to get the boils with a green kitchen scouring pad and dial antibacterial soap, and take lots of showers. Antibiotics rarely help. loose fitting cotton clothing aids in wicking the moisture away from the body and 9 out of 10 times I find an ingrown hair has been the cause of the inflamation. sucks as there is no cure. I've been dealing with this for 22 years.
Could it be underarm folliculitis? I have recently experienced the same thing myself and am trying to figure it out
I realize this is an old post, but I'm posting for any others who happen upon this post. GO SEE A DOCTOR! I had the same thing on my leg and it was MRSA. If I had gone any later I might've had to be on anitbiotics. This is treatable, but you definitely need antibiotics, or it will jsut keep popping up in other areas. I now have a nickel-sized hole in my leg because I wanted too long to see a doctor. Good luck!