患者,女,23岁,因剧烈头痛五天而就诊。五天前曾有一过性发热,逐渐感前额部及后枕部疼痛,呈刺痛,难忍受,有明显恶心感,偶而呕吐胃内容物,并有头昏、乏力等不适。但无腹痛、腹泻及纳差。体检示神清,巩膜及皮肤无黄染,颈软,心肺叩听无异常发现,肝脾肋下未及,未引出病理性神经反射。化验示血红蛋白118g/L,外周血白细胞数4. 2×10~9/L,中性0. 68,淋巴0. 32;脑脊液示压力200mmH_2O,无色透 Patient, female, 23 years old, treated for five days due to severe headache. Five days ago had a transient fever, gradually feeling the forehead and occipital pain, was tingling, intolerable, with significant disgusting, vomiting stomach contents, and dizziness, fatigue and other discomfort. But no abdominal pain, diarrhea and anorexia. Physical examination showed Shen Qing, sclera and skin without yellow dye, neck soft, no abnormal heart-lung tap, liver and spleen ribs did not reach, did not lead to pathological reflex. Laboratory showed hemoglobin 118g / L, the number of peripheral blood leukocytes 4. 2 × 10 ~ 9 / L, neutral 0.68, lymph 0.32; cerebrospinal fluid pressure 200mmH_2O, colorless and transparent