To my understanding, neither CBD nor THC are effective for “severe” pain; rather, they work better for mild to moderate chronic pain. Often, with severe pain, the dosage of opiates can be decreased with concomitant use of medical cannabis or CBD and that decrease in dose makes their use safer. Concurrent use of THC does increase the analgesic effect of CBD, but it also adds the “high” which some people do not want as a side effect.
In fact, not only will CBD not make you high, it has been proven to counteract the psychoactivity of THC. This property makes CBD highly useful as a medical treatment for a wide range of conditions. In terms of the CBD products you can buy, the amount of THC present varies from none at all in a pure CBD Isolate to a minimal amount (less than 0.3%) in a Full-Spectrum CBD product.
Topicals – Topicals are typically salves or creams that have been infused with cannabis or hemp oil. This allows for easy use to treat problem areas. Many senior citizens use topicals for arthritis or other auto-immune disorders however because of restrictions imposed by various agencies we are not allowed to say whether this is an effective treatment or now. However, a quick Google search will help you find what you are looking for in terms of effectiveness.