蛛网膜下腔出血的诊断可分为二步。第一步先确定是否为蜘网膜下腔出血。第二步是病因的诊断。当病人骤然发生剧烈头痛、呕吐、意识障碍(多为轻度一过性的)等神经精神症状,颈强直明显的脑膜刺激征时,即应考虑蜘网膜下腔出血的 The diagnosis of subarachnoid hemorrhage can be divided into two steps. The first step is to determine whether it is sub-subarachnoid hemorrhage. The second step is the diagnosis of the cause. When the patient suddenly severe headache, vomiting, disturbance of consciousness (mostly mild transient) and other neuropsychiatric symptoms, obvious meningeal neck meningeal irritation, that should consider sub-epicural hemorrhage