There are many causes of brainstem hemorrhage, and in most clinical cases, it is seen in patients who have a history of hypertension and diabetes, and whose blood pressure and blood sugar have not been well controlled. Over time, due to prolonged high blood pressure or high blood sugar, arteriosclerotic changes occur in the vessels, and the vessels' own contractile function gradually declines. Under certain triggering factors, such as fatigue, exhaustion, mental stress, or excessive emotional excitement, the patient may experience transient dilation of the vessels, exceeding their regulatory capacity, which can lead to brainstem hemorrhage. Once brainstem hemorrhage occurs, it often leads to significant disturbances in consciousness within a short period, manifested as stupor or coma.