The causes of subarachnoid hemorrhage include intracranial lesions, systemic diseases, trauma, and other factors.
1. Intracranial lesions: such as intracranial aneurysm, intracranial arteriovenous malformation, smog disease, intracranial venous thrombosis, intracranial tumors and so on.
2. Systemic diseases: such as thrombocytopenia disease, hypertension, hemophilia, autoimmune diseases, etc.
3. Trauma: subarachnoid hemorrhage may also occur in head trauma.
4. Other factors: such as the application of anticoagulant drugs.
Subarachnoid hemorrhage may occur if there is severe headache, vomiting, impaired consciousness, head trauma, convulsions, etc. It is recommended to go to the hospital in time to avoid delaying the condition.