Oregano oil may have the following health benefits: Fighting bacteria. ... Treating small intestine bacterial overgrowth (SIBO) ... Treating fungal infections. ... Providing antioxidants. ... Reducing inflammation. ... Healing wounds. ... Repelling insects. ... Relieving pain. ... Oregano oil is believed to provide several health benefits, including fighting bacteria, treating small intestine bacterial overgrowth (SIBO), treating fungal infections, providing antioxidants,…