典型的蛛网膜下腔出血（SAH）具有头痛、呕吐。脑膜刺激征、血性脑脊液三联征。不典型者易造成误诊。本文报告3例以眩晕为首发症状和突出表现，缺乏头痛的SAH。1病例报告例1女性，62岁。与他人吵架后头晕，视物转动，周身无力，行走不稳，恶心1h入院。有高血压史8年，2年前有类 A typical subarachnoid hemorrhage (SAH) has headache and vomiting. Meningeal irritation, bloody cerebrospinal fluid triple sign. Atypical easily lead to misdiagnosis. This article reports 3 cases with dizziness as the first symptom and outstanding performance, lack of headache in the SAH. 1 Case Report 1 Female, 62 years old. After quarreling with others dizziness, depending on the material rotation, the whole body weak, unstable walking, nausea 1h admission. Have a history of hypertension for 8 years, there are two years ago class