I would guess that perhaps Valium relaxes you, and helps with the pain cycle, where you perhaps get tense & inflamed muscles because of it, which can then trap nerves & cause more pain…a guess though, not a medical opinion! And anxiety could also cause you to tense up as well, plus long term effects of stress where cortisol causes more inflammation?
@Chrickychricky has posted about neuroplasticity ( Neuroplasticity is the brain’s ability to reorganize and adapt its neural connections in response to learning, experience, or injury) , which you might find interesting to read:
Symptomatic.me | Understand & Heal Neuroplastic Pain
Public Q & A if you are interested in learning more about neuroplastic symptoms and treatment - General - Living with Eagle
Other members have had enlarged, tight muscles, this all seems to be linked, the SCM muscle is particularly often affected.
There are 2 types of neuralgia; type 1 is the electric shock like pain, but type 2 or atypical neuralgia is more of an aching, burning or boring pain, which many of us have with the trigeminal nerve, I have toothache for example but there’s nothing wrong with the tooth…