A 25-year-old English woman suffers from a rare condition that makes her vomit at least 60 times a day and does not let her eat or drink anything if not standing. Also known as achalasia, a swallowing ...

These contractions occur automatically and are regulated by nerves, which work to activate and relax the esophageal muscles as needed. Esophageal spasms occur when these nerves misfire and don't ...