A response to AlkaSeltzer can suggest that you have soft tissue damage/inflammation. Any NSAID may also work. Arthritis can compress nerves, and by reducing the arthritis, the nerves may quiet down.

Do you have dental implants? You keep mentioning IV steroids for your dental work... that is typically not common.
Did you exercise while having the dental work done? People who have infections or viruses, may drive the organisms into the tissues with too much activity. It is best to rest well when ill.
This happened to a gym teacher of my son's in high school... he
worked out too much while ill and drove the virus into his pericardial sac and almost died. (he was in his early 40's)

But it is possible if you have implants, that your body is reacting to them as a foreign object. We have had posters who reacted to joint implants..knee and hip... in the past.