One of the classic functions of cannabis is as an analgesic, which is used since 2900 BC. The human body produces a special substance known as endocannabinoid, which is useful for transmitting neurological messages to allow basic bodily functions such as sleep, pain and response. immune. CBD oils relieve chronic pain by directly affecting the activity of the endocannabinoid receptor, so pain and inflammation of the nerve can also be significantly reduced. This trait allows CBD oil to cure arthritis and multiple sclerosis.