Risk factors

Although anyone — including otherwise healthy people — can develop boils or carbuncles, the following factors can increase your risk:

• Close contact with a person who has a staph infection. You're more likely to develop an infection if you live with someone who has a boil or carbuncle.
• Diabetes. This disease can make it more difficult for your body to fight infection, including bacterial infections of your skin.
• Other skin conditions. Because they damage your skin's protective barrier, skin problems, such as acne and eczema, make you more susceptible to boils and carbuncles.
• Compromised immunity. If your immune system is weakened for any reason, you're more susceptible to boils and carbuncles.