We have cannabinoid receptors on the skin, so we can make a topical cream that can be applied directly to the area needed, reducing both pain and inflammation. Used topically, the cannabis bypasses the liver and doesn’t have any psychoactive effect. You don’t get high!
You can use either coconut oil or shea butter as the base. Coconut oil is absorbed more slowly making it good for skin conditions, whereas the shea butter goes in quickly and is great for pain such as arthritis.
Because cannabis absorbed through the skin doesn’t make you high, you can use a strain that has higher THC.
I found a good recipe on the Green Rush Daily site: http://www.greenrushdaily.com/20156/01/31/cannabis-creams/