Oregano oil is a powerful essential oil that has proven to be just as effective as some antibiotics when it comes to treating or preventing various infections, without the harmful side effects that come with antibiotics. Common examples of conditions that oregano oil can help manage include: nail fungus or athletes foot, common colds, gingivitis, earaches, toothaches, digestive problems such as heartburn and SIBO (small intestine bacterial overgrowth), yeast Infections and UTIs, sinus Infections and allergies. The predominant healing compound found in oregano oil, carvacrol, has widespread uses ranging from skin protection to tumor inhibition.