Laws are such that hemp-based CBD cannot contain higher than 0.3% THC, use of it should not appear on drug screening results. Chronic use of THC may obviate this fact.
Applying a CBD salve to a problem area may aid in relief. Begin by applying once a day, however, you may find better or quicker relief by applying more often.
In the European Journal of Pain, studies affirmed the effectiveness of a topical application of CBD salve for the potential relief of arthritis pain and inflammation without side effects.
When applied to problem areas 1-3 times per day most people achieve relief. Some will apply them every hour but overall it is better to adjust application to how your body and pain respond.