A boil generally starts as a reddened, tender area. Over time, the
area becomes firm and hard. Eventually, the
center of the
abscess softens and becomes filled with pus. Finally, the pus "forms a head," which can be surgically opened or spontaneously drain out.
compresses on these bumps
and consult a dermatologist for examination and confirmation of diagnosis.
I hope it helps. Take care and regards.