Diagnosis
Your doctor can usually diagnose a carbuncle by looking at your skin. A pus sample may also be taken for lab analysis.
It’s important to keep track of how long you’ve had the carbuncle. Tell your doctor if it’s lasted longer than two weeks. You should also mention if you’ve had the same symptoms before.
If you keep developing carbuncles, it may be a sign of other health issues, such as diabetes. Your doctor may want to run urine or blood tests to check your overall health.