Mast cell activation syndrome (MCAS) is one of the most misunderstood conditions I see in my telehealth functional medicine clinic. and it's often the missing piece for people who feel like they're Mast cell activation syndrome, neck pain and the vagus nerve What is Mast Cell Activation Syndrome? TICKED OFF MAST CELLS Mast Cell Activation Syndrome: A Primer for the Gastroenterologist Digestive Diseases and Sciences Springer Nature Link