After a ruptured cerebral aneurysm bleeds, it is usually mild, i.e., there is no impairment of consciousness, and it manifests itself as a severe headache, described as the worst headache of a lifetime, a stick-like headache, or some people develop neck ankylosis, as well as photophobia, vomiting, cranial nerve symptoms, such as sometimes one eye hitching down and not being able to open, and problems with the rotation of the eye. Some people develop facial palsy, a more serious symptom, and some have more bleeding, sometimes immediately falling into coma; some patients also have a combination of epilepsy, with intracerebral hematoma after the onset of the disease, and can also have seizures and epileptic symptoms. There are reports in the literature that some patients have mild headache and vomiting before bleeding at 2-8 weeks, which are called aura symptoms. If such symptoms occur, some patients can go to the hospital in time for CT angiography, and cerebral angiography, which can detect aneurysm in advance.