Blood pressure 90-160 after cerebral infarction is defined as a blood pressure of 160/90 mmHg. Whether it is dangerous or not should be specifically analyzed according to different periods. If it is in the acute stage, it is generally not dangerous and can be left untreated and closely monitored after clinical assessment by a physician. If the patient is in the recovery phase, it is recommended to use drugs to control blood pressure. The blood pressure of 160/90mmHg after cerebral infarction may be caused by the body’s stress response under physiological state, or it may be caused by the patient’s hypertension before cerebral infarction, or autonomic dysfunction after cerebral infarction. According to the latest guidelines, as long as the blood pressure after cerebral infarction does not exceed 200mmHg (if it rises too high, complications such as cerebral hemorrhage will occur), there is generally no need to do any antihypertensive treatment after the physician’s assessment, and only need to closely monitor the patient’s blood pressure and other basic vital signs. If the blood pressure is 160/90mmHg during the recovery period after cerebral infarction, it is recommended to use antihypertensive drugs to deal with it and control the blood pressure below 140/90mmHg, or else cerebral hemorrhage and other diseases may occur. Patients with significantly high blood pressure after cerebral infarction need to actively seek medical attention, pay attention to the changes in the patient’s blood pressure, and actively cooperate with the physician’s treatment.