Reflux is the backward flow of stomach contents into the esophagus. Occasional reflux is common and often not dangerous, but frequent or uncontrolled GERD can lead to esophagitis, strictures, ulcers, and in some cases Barrett’s esophagus. Risk is driven less by “how intense it feels” and more by how persistent it is and whether tissue damage develops. Nighttime reflux can be more concerning because acid contact time is longer. GERD may also contribute to chronic cough, hoarseness, and asthma-like symptoms. Seek prompt medical evaluation if alarm signs occur: difficulty swallowing, bleeding, unintended weight loss, persistent vomiting, or chest pain. With a structured, evidence-based plan, reflux is manageable in most people.