For patients with brainstem hemorrhage, there is often a lack of specific precursors, and most patients do not have obvious characteristic symptoms beforehand. Some patients may have underlying chronic diseases such as hypertension, diabetes, and hyperlipidemia. Prior to a brainstem hemorrhage, patients often exhibit mild headaches, dizziness, nausea, and significant increases in blood pressure. Certain triggers like fatigue, exhaustion, emotional stress, or vigorous activity can lead to a brainstem hemorrhage. Once a hemorrhage occurs, patients typically experience severe headaches, dizziness, nausea, vomiting, and even coughing or choking when drinking water. In more severe cases, patients may also show signs of drowsiness, stupor, or even coma.