Ask this in the physics area next time please, but turn to someone you trust or if your young an adult, like your parents or your teachers. Maybe even your friends. No matter what age tell someone and if they don't know then get medical help if they can't.
A cluster of furuncles, or boils, is called a carbuncle. The cluster is caused by bacterial infection, most commonly with Staphylococcus aureus or Streptococcus pyogenes.
