What is Carbuncle?
A carbuncle ( or ) is an abscess larger than a boil, usually with one or more openings draining pus onto the skin. It is usually caused by bacterial infection, most commonly Staphylococcus aureus, or Streptococcus pyogenes, which can turn lethal. However, the presence of carbuncles is actually a sign that the immune system is working. The infection is contagious and may spread to other areas of the body, or other people; those living in the same residence may develop carbuncles at the same time.