The stellate ganglion block is thought to modulate the vagus nerve. Sometimes an overactive response slows responses like digestion, sometimes it aggravates the digestive system.
People with long Covid, PTSD, hot flashes, digestive motility problems, anxiety might benefit. I think that almost anyone would benefit from the block because with these long lives we repeatedly stress the autonomic nervous system. Probably the only way to know is to have an injection. High cortisol levels could be a clue. I didn't have any diagnosis. The doctor just listened before giving me the shot.