bacterial skin infection
"I suddenly got a 5 angry red boils on my chin...and the next day another 10. I knew I better see a Doc quickly. My Doc prescribed Keflex 500mg, and said that in 3-4 days, it should start working.  But the boils kept spreading to my upper lip and cheeks. So, I got in touch with the Doc. He promptly changed the med to Bactrim 800/160, twice daily. With the second pill, I felt that the battle with the bacteria had changed. No more new boils were forming, and existing ones started  becoming black instead the fiery red. The black boils are hard and not painful to the touch. Now, it is only 2 days out of the 10 day dosage, but I feel I am on the way to recovery. 
I don't know what caused this infection but I switched out my old razor blade."