Brainstem hemorrhage is relatively painful, and most patients with brainstem hemorrhage will exhibit severe headaches and dizziness. The nature of the pain is intense, resembling a cutting pain that is hard to tolerate. However, when the amount of bleeding is large, it can quickly cause damage to important nerve nuclei in the brainstem, and even affect the central nervous system responsible for consciousness, leading to the patient falling into a stupor or coma. In such cases, the patient may not feel pain, but for those who are conscious, severe headaches and dizziness, accompanied by a strong sense of vertigo, especially noticeable when changing positions, often occur.