This mass may be deeper beneath the skin surface than simple furuncles. They develop slowly, and may be so deep that they do not drain on their own. Carbuncles may develop anywhere, but they are most common on the back and the nape of the neck. Carbuncles are less common than boils .
Men are more prone to carbuncles than women.
Staph skin infections are contagious. They may spread to other areas of the body, and may spread to other people. It is not uncommon for several family members to be affected at the same time. Poor hygiene, run-down physical condition, friction from clothing or shaving, and similar factors may make them more likely. Diabetics and people with suppressed immune systems are more prone to development of staph skin infections, as are people with dermatitis , pernicious anemia , and other disorders.