Headache three months after cerebral hemorrhage may be caused by elevated blood pressure or hematoma is not completely eliminated, in addition, if there is an infection, another cerebral hemorrhage can also lead to headache, you should actively treat the cause of the disease. 1. Elevated blood pressure: a sharp rise in blood pressure due to emotional instability can cause dizziness, headache and other discomforts, so it is necessary to maintain emotional stability, control blood pressure, and take antihypertensive medications, such as nifedipine, amlodipine, etc., as prescribed by the doctor if necessary. 2. Existence of hematoma: If there is more cerebral hemorrhage, it is difficult for the hematoma to be completely absorbed and recovered, and the retention of bruises can cause headache, which is one of the sequelae of cerebral hemorrhage, and some medicines can be used to improve cerebral vascular circulation, for example, guipizide maleate, perphenazine, and so on. 3. Infection: Infectious diseases, such as upper respiratory tract infection, meningitis, brain abscess and other diseases, can cause headache, generally need to use anti-infection treatment, such as ceftriaxone, ganciclovir and so on. 4. Re-hemorrhage: the re-emergence of cerebral hemorrhage can also cause headache, can also be accompanied by impaired consciousness, fainting, hemiparesis, crooked mouth and eyes, etc., need to be timely for hemostasis, lowering the cranial pressure and other treatments, can be followed by the use of mannitol, aminomethylenecarbamate, etc., and need to be surgical treatment if necessary. It is recommended that patients seek timely and complete examination, follow the doctor’s instructions and rational use of medication, avoid blindly use their own medication.