What causes nausea and dry heaving?

　　In daily life, people frequently hear about symptoms such as nausea and vomiting. However, mild nausea is often overlooked by many individuals, who assume it is not a serious condition and therefore adopt a lax attitude toward treatment—making it difficult to rule out chronic nausea and vomiting caused by an underlying disease. So, what causes nausea and dry heaving without vomiting?

　　What Causes Nausea and Dry Heaving?

　　The primary causes of nausea and dry heaving should include disorders of the central nervous system. For example, when cerebral blood supply is insufficient—such as in cerebral arteriosclerosis—the arterial walls lose elasticity and the vascular lumen narrows, reducing cerebral blood flow per unit time. This leads to cerebral ischemia and hypoxia, resulting in paroxysmal vertigo, nausea, and dry heaving. Nausea and dry heaving may also stem from hypertension, which alters hemodynamics and increases lateral pressure on the vessel walls.

　　Elevated blood pressure can easily occur under conditions such as excessive work, intense physical exercise, or sleep deprivation. Subsequent vasodilation may trigger symptoms including nausea and dry heaving. Additionally, peripheral vestibular disorders—including Ménière’s disease, vestibular neuritis, and benign paroxysmal positional vertigo (BPPV)—should be considered, as they commonly present with dizziness, nausea, and dry heaving.

　　Patients should seek medical evaluation at a hospital as soon as possible to determine the underlying cause. Once diagnosed, targeted treatment based on the etiology should be initiated promptly to prevent disease progression and potential adverse outcomes. We hope this information proves helpful to you.