Boils and Carbuncles

: "How are they diagnosed?
Your health care provider will examine the infected area. Tell your provider if you have had a boil or carbuncle longer than 2 weeks or if you have boils often.
If you have boils often, you may have lab tests of your blood or urine. These tests can check for conditions that might cause the sores, such as diabetes mellitus or kidney or liver disease. "