Some natural remedies for carbuncles include tea tree oil, turmeric and hydrotherapy, claims Find Home Remedy. Tea tree oil is an antibacterial, antifungal and antiseptic agent, and anecdotal evidence suggests that applying it to a carbuncle may cause relief.
Using turmeric, a blood purifier with anti-inflammatory properties, in tea form three times a day helps treat carbuncles, says Find Home Remedy. Evidence shows that using black pepper with turmeric potentially increases its effectiveness by 2000 percent, according to PubMed.
Hydrotherapy involves soaking a washcloth in warm salt water and placing it on the carbuncle. Patients can do this for 15 minutes five times a day to alleviate pressure, according to Find Home Remedy.