Marijuana has been used to treat pain as far back as 2900 B.C. More recently, scientists have discovered that certain components of marijuana, including CBD, are responsible for its pain-relieving effects.
The human body contains a specialized system called the endocannabinoid system (ECS), which is involved in regulating a variety of functions including sleep, appetite, pain and immune system response.
The body produces endocannabinoids, which are neurotransmitters that bind to cannabinoid receptors in your nervous system. Studies have shown that CBD may help reduce chronic pain by impacting endocannabinoid receptor activity, reducing inflammation and interacting with neurotransmitters.
For example, one study in rats found that CBD injections reduced pain response to surgical incision, while another rat study found that oral CBD treatment significantly reduced sciatic nerve pain and inflammation.
Several human studies have found that CBD is effective in treating pain related to multiple sclerosis and arthritis.