Subarachnoid hemorrhage patients after surgery, the following precautions: 1, observe the patient’s consciousness, the patient’s vital signs, temperature, pulse, respiration, blood pressure; 2, observe the patient’s pupil, because the pupil in the doctor’s view is an easy to find changes in the condition of the observation point, through the pupil of the light reflex is sensitive, whether there is a dilatation, to observe the condition of the rapid changes; 3, observe the state of consciousness, the GCS score can basically determine whether the consciousness is clear or comatose. The GCS score can basically determine whether the patient’s consciousness is clear or coma. For example, if the patient’s score decreases by more than 2 points, it should be a problem that needs to be actively dealt with; 4. Observe the limb movement as well as the urinary and faecal conditions, especially the stool, because the unsmooth stool will easily cause constipation, and constipation will cause the change of intracranial pressure.