Abstract: Objective　To explore the pathogenesis of cyberchondria and its impact on individuals.Methods　Study design was qualitative.In January 2016，one-to-one semi-structured interviews were carried out in a random sample of 6 persons who scored high on Chinese version of Cyberchondria Severity Scale（≥36.50）and Chinese version of Short Health Anxiety Inventory（≥44.52） for collecting the data about the frequencies of searching the information concerning health/illness，source of information，reactions after searching，and impact of searching on oneself.Data obtained were organized and analyzed using NVivo 11 and grounded theory.Results　Participants demonstrated a good understanding of the strengths and limitations of online health/illness-related information.Reactions after searching mainly include the following 3 aspects——cognitive reactions：spending time on searching for such information online was thought to be helpful，worthwhile and necessary；emotional reactions：being scared/confused of and worried/anxious about their own conditions；behavioral reactions：self-diagnosis and self-treatment/medication were attempted to be conducted，or seeking healthcare in hospitals or continuing to search the relevant information.Causes for long-term prevalence of cyberchondria cover the following 4 aspects：insufficient explanations related to treatment given by professional physicians，self-perceived poor health status，poor tolerance of uncertainty and perfectionism.Conclusion　Contradictory emotional and cognitive reactions can be found in individuals with cyberchondria after searching health/illness-related information online，which，together with the causes of cyberchondria，can be used as the basis for monitoring such information and delivering clinical interventions.

Key words: Cyberchondria, Anxiety, Qualitative research

摘要： 目的　了解网络疑病症的发生机制及影响。方法　于2016年1月在北京市选取网络疑病症量表、短版健康焦虑量表得分均处于较高水平（网络疑病症量表得分≥36.50分，短版健康焦虑量表得分≥44.52分）的6例网络疑病症个体进行“一对一”的半结构化访谈，主要访谈内容包括搜索健康/疾病相关信息的频率、来源、搜索后感受、对自身影响等。采用NVivo 11软件，基于扎根理论，对访谈所得资料进行整理和分析。结果　网络疑病症个体对网络健康/疾病信息的优缺点有较清晰的认知，搜索健康/疾病信息后的反应主要表现在认知、情绪、行为3个方面。认知反应：网络搜索健康/疾病信息对自身有帮助，花费时间去搜索网络疾病/健康信息是值得且有必要的；情绪反应：恐慌/担心、焦虑/迷茫；行为反应：做出诊断、尝试疗法/药物、不做出诊断、到医院就诊、继续搜索。网络疑病症的维持原因包括：正规医生的解答模糊，自觉身体状况不良，对不确定性的忍受力较差，完美主义。结论　网络疑病症个体的情绪与认知存在矛盾性，对于网络健康/疾病信息的监管、网络疑病症的临床干预，可以从这种矛盾性和网络疑病症产生的原因方面考虑。

关键词: 网络疑病, 焦虑, 定性研究