Ozone therapy refers to the process of administering ozone gas  directly into your body to treat a disease or wound. Ozone is a colorless gas made up of three atoms of oxygen (O3).
 
Despite the Food and Drug Administration's statement that ozone is toxic and has no proven medical applications, some research has found that ozone may be used to treat medical conditions by stimulating the immune system. It may also be used for disinfection and treatment of a wide range of diseases, including:
Inactivating common infectious pathogens like bacteria, viruses, fungi, yeast, or protozoa
Breathing disorders
Diabetes
Immune disorders
Inflammatory conditions
Musculoskeletal issues
Certain forms of malignancy