Cannabinoids are compounds found in cannabis. The most notable cannabinoid is the phytocannabinoid tetrahydrocannabinol (THC) (Delta9-THC or Delta8-THC), the primary psychoactive compound in cannabis. Cannabidiol (CBD) is another major constituent of the plant. CBD does not have the same psychoactivity as THC.
According to many latest research, CBD has many health benefits including pain relief. Here are a few links that provides more details on such benefit:
In addition, CBD has anti-inflammatory and anti-oxidant effects. There are already some medical research on these topics.
That's why increasingly more skincare products are using CBD as their ingredients.
Source: Wikipedia, Healthline.com, Health.com, National Center for Biotechnology Information