A GERD diagnosis means learning why heartburn keeps coming back and what actually stops it. This is the calm, plain-English companion for what comes next. It explains the valve mechanism behind reflux, the difference between NERD, erosive disease, and Barrett's esophagus, the four medicine categories from antacids to newer options, and the surprising symptoms like nighttime cough that get missed for years. It covers the red flags that mean call the doctor now, not later. No jargon. No fear. No filler. Just what you actually need, in the order you need it, with clear tables, checklists, and the exact questions to bring to your next appointment.