Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
These concerns may need assessment soon but are not always emergencies.
Go to an emergency department for:
Contact a clinician promptly for worsening pain accompanied by new weakness, increasing falls, new urinary difficulty, or a significant change in walking.
Routine follow-up may involve primary care, pain medicine, neurology, rehabilitation, or spine specialists.
The frequency depends on symptom stability, functional needs, and current treatments.
At follow-up visits, discuss changes in pain, strength, sensation, walking, sleep, bladder or bowel function, and ability to complete daily tasks.
Medication benefits and side effects should be reviewed.
Rehabilitation goals may need adjustment as abilities or circumstances change.
The article also says
Repeat imaging is not always needed for stable symptoms.
It may be considered if there is new or progressive weakness, a major change in sensation, new bladder or bowel symptoms, or concern for another spinal condition.
Every sign above is quoted from the sofidex article on Arachnoiditis. If you are not sure, err upward — it is always reasonable to be checked.