What causes frequent dry heaving?

Occasional dry heaving—retching without vomiting—is a common and usually benign phenomenon, often triggered by transient gastrointestinal irritation, heightened gag reflex sensitivity, or mild autonomic nervous system activation. However, recurrent or persistent dry heaving warrants clinical evaluation, as it may signal underlying conditions such as gastroesophageal reflux disease (GERD), gastroparesis, chronic gastritis, or functional dyspepsia. Neurological causes—including vestibular disorders (e.g., vestibular migraine or labyrinthitis), increased intracranial pressure, or brainstem pathology—can also manifest with repeated retching. Psychogenic factors like anxiety, panic disorder, or anticipatory nausea (particularly in individuals with prior negative experiences related to vomiting) are well-documented contributors. Less commonly, metabolic disturbances (e.g., electrolyte imbalances, uremia, diabetic ketoacidosis), medication side effects (especially opioids, certain antibiotics, or chemotherapeutics), pregnancy (particularly in the first trimester), or early-stage intestinal obstruction should be considered. A thorough history—including timing, triggers, associated symptoms (e.g., heartburn, abdominal pain, dizziness, headache, weight loss), and medication use—is essential. Physical examination and targeted investigations (e.g., upper endoscopy, gastric emptying study, basic metabolic panel, or neuroimaging if indicated) help guide diagnosis and management. Patients experiencing frequent dry heaving, especially when accompanied by red-flag symptoms such as hematemesis, dysphagia, unintentional weight loss, or neurological deficits, should seek prompt medical evaluation.