"when having indigestion"

Persistent Nausea, Your Stomach Is Sending an SOS: How to Understand Vomiting Symptoms

Have you ever felt nauseous right after waking up in the morning, felt heavy and congested after merely eating a meal, or even experienced retching when it worsened? This recurring discomfort is not something you should simply dismiss as simple indigestion. It may be an urgent SOS signal that your stomach is sending you right now.