Arachnoid hemorrhage is generally referred to as subarachnoid hemorrhage. Subarachnoid hemorrhage can lead to hemiparesis, seizures, hydrocephalus, headache, coma and other consequences. 1. Hemiparesis: When subarachnoid hemorrhage is severe, it can lead to nerve tissue damage, which affects limb movement and hemiparesis, and can cause anemia. 2. Seizures: Subarachnoid hemorrhage can also cause cerebral vasospasm, which may lead to seizures. 3. Hydrocephalus: After subarachnoid hemorrhage, the blood will coagulate and obstruct the circulation of cerebrospinal fluid, which may cause hydrocephalus. 4. Headache: after arachnoid hemorrhage, intracranial pressure will be increased, which will easily cause sudden headache, and the headache will be progressively aggravated and not easy to be relieved. 5. Coma: patients with serious condition may fall into a coma quickly or gradually within a short period of time. Subarachnoid hemorrhage is generally not self-curable, and it is recommended that patients seek timely medical treatment and standardized treatment under the guidance of the doctor, so as not to affect the quality of life and survival time.