Knowing when reflux symptoms cross the line from "manage at home" to "get evaluated" is one of the more practically useful things to understand, since it's not always obvious from symptoms alone.
Alarm symptoms that warrant prompt evaluation
Difficulty or pain swallowing, unintentional weight loss, vomiting blood or material that looks like coffee grounds, black or tarry stools, persistent vomiting, or a sensation of food getting stuck are all signals to seek medical evaluation promptly rather than waiting or trying additional home remedies first.
Other reasons to consider evaluation, even without alarm symptoms
Symptoms that haven't improved after a reasonable trial of over-the-counter treatment and lifestyle changes, reflux that's frequent enough to significantly affect quality of life, or a family history of Barrett's esophagus or esophageal cancer are all reasonable, non-urgent reasons to discuss endoscopy with a doctor even without an alarm symptom present.
The general principle
Occasional, mild heartburn that responds to simple changes generally doesn't need immediate evaluation. Frequent, severe, or changing symptoms — especially with any alarm symptom — warrant a conversation with a doctor rather than continued self-management, since some of the more serious underlying causes are only identifiable through direct examination.
