products : It is often added to tooth powders, gargles, and toothpastes. * Disinfectant : Spearmint oil can be used to treat internal and external infections, including scabies, dermatitis, syphilis, and other transmittable conditions. * Bath oil : When added to bath water, spearmint oil can induce relaxation and can cool you off by reducing your body temperature. * Massage oil : With its antispasmodic properties, spearmint oil can help relieve muscle pain and even abdominal pain due to menstruation. * Insecticide : This oil can ward off mosquitoes and other insects. It is often added to insect repellents, creams, mats, and fumigants.