Final answer:
Heartburn, regurgitation, and gastric inflammation are signs of indigestion or dyspepsia, which can be caused by various factors including GERD or gastritis.
Step-by-step explanation:
Heartburn, regurgitation, and gastric inflammation are all signs of indigestion or dyspepsia, a condition of impaired digestion. Indigestion can occur without evidence of an organic disease, but it can also be a symptom of an organic disease, most commonly gastroesophageal reflux disease (GERD) or gastritis. Heartburn is a painful burning sensation in the chest caused by stomach acid backing up into the esophagus. Gastric inflammation refers to the irritation of the stomach lining, often caused by excessive stomach acid.