A treatment used to help people with chronic pain is giving new life to survivors of posttraumatic stress disorder. It's called stellate ganglion block (SGB) and right now it's one of the only injectable medical procedures available to treat PTSD. The treatment takes just minutes but doctors say it can offer a lifetime of relief.

The procedure involves injecting an anesthetic into the neck, specifically around the main nerve that controls the fightorflight response. The process begins with an ultrasound, giving the doctor realtime feedback on how to precisely position the needle. The anesthetic acts as a block, reducing nerve impulses and allowing the part of the brain that controls the fightorflight response to reset.

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