Researchers think that CBD interacts with receptors in your brain and immune system. Receptors are tiny proteins attached to your cells that receive chemical signals from different stimuli and help your cells respond. This creates anti-inflammatory and painkilling effects that help with pain management. This means that CBD oil may benefit people with chronic pain, such as chronic back pain. One 2008 review assessed how good CBD works to relieve chronic pain. The review looked at studies conducted between the late 1980s and 2007. Based on these reviews, researchers concluded CBD was effective in overall pain management without adverse side effects. They also noted that CBD was beneficial in treating insomnia related to chronic pain.