Headache
头痛
Headache is a pain in the head and neck region that may be either a disorder in its own right or a symptom of an underlying medical condition or disease. The medical term for headache is cephalalgia. Headaches are one of the most common and universal human ailments, described in the Bible as well as in medical writings from ancient Egypt, Babylonia, Greece, Rome, India, and China.
头痛就是头、颈部之疼痛，既可能是一种病症，也可能是某种潜在医疗问题或疾病的症状。头痛的医学术语为cephalagia。头痛是人类最常见、最普遍的不适之一，在圣经及古代埃及、巴比伦、希腊、罗马、印度和中国的医书中都有描述。
Contemporary doctors divide headaches into two large categories, primary and secondary, according to guidelines established by the International Headache Society (IHS) in 1988 and revised for republication in 2004. Primary headaches are those that are not caused by an underlying medical condition. There are three types of primary headaches: migraine, cluster, and tension headaches. More than 90% of all headaches are primary headaches. Secondary headaches are caused by disease or medical condition; they account for fewer than 10% of all headaches. form www.med66.com
根据国际头痛协会1988年制定、2004年修订的指导文件，头痛现分为两大类：原发性头痛和继发性头痛。原发性头痛是并非由潜在疾病所致的头痛，它又可以分为三小类：偏头痛、丛集性头痛和紧张性头痛。90%以上的头痛属原发性。继发性头痛是由疾病或医疗问题引起的，所占比例不到全部头痛的10%。
