A good or advanced physical therapist should be able to differentiate if it is muscle spasms you are having and possibly what the cause might be.
Like if it is posture, scoliosis, or use related, and if the nerves might be causing some of it.
Sometimes it becomes a circle of pain - nerve tells muscle to tighten or spasm & then the tight muscle pulls more on the spine & so on...

A good PT should be able to help calm the muscles down with manual trigger point release, heat, massage, ultra sound, low level laser - what ever modalities that won't disrupt your SCS.