DMSO (dimethyl sulfoxide) can be used as a prescription medicine or as a dietary supplement. You can take it intravenously, apply it topically, or even take it orally, depending on its intended purpose. For example, you will apply DMSO creams or oils to reduce pain, while increasing the healing speed of wounds, burns, and other types of injuries by blocking the pain receptors. You can also use it for treating painful headaches, inflammations, and arthritis. What’s more surprising, DMSO is also proven beneficial to treat various painful eye conditions such as glaucoma and cataracts.