Hi @kimh, You can get a better explanation by googling it but basically they locate a nerve bundle in the middle of your abdomen using a scanner called fluoroscopy or EUS (endoscopic ultrasound). Then they kill the nerves using alcohol injected through a needle. Usually it works for a few months to years depending on nerve regrowth. It's typically used for intractable pain from chronic pancreatitis or pancreatic cancer. I don't know if links work in this forum but here is a case study for MP.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4436925/