Final answer:
Clusters of furuncles, also known as boils, are called carbuncles. They are deeper and usually require medical attention due to potential systemic symptoms.
Step-by-step explanation:
Clusters of furuncles (boils) are called carbuncles. A furuncle is a deep infection in the skin that begins in a hair follicle or oil gland. When multiple furuncles merge and form into a deeper, more severe lesion, it becomes known as a carbuncle, which is typically associated with systemic symptoms such as fever or a general feeling of illness. Carbuncles tend to be larger than furuncles, more painful, and may require medical intervention like drainage and antibiotic treatment.