There is no scientific evidence that can prove that cancer can be treated by CBD oil usage. However, the European Journal of cause discomfort studies Serenity Prime Tinnitus shows that CBD oil can edit backache and treat arthritis if applied to the skin. It represses neuropathic and inflammatory pain. Some studies fabricate an effect that people affected as soon as cancer who took marijuana during the trials took fewer painkillers. CBD can information be boil and cancer treatment side-effects, says the National Cancer Institute of U.S.