Hypochondria refers to an excessive preoccupation with one's health, usually focusing on some particular symptom, as cardiac or gastric¹ problems. 

疑病症指的是过度担忧个人健康问题，通常集中于某些特定的症状，比如心脏或者胃部不适。

 

This debilitating² condition is the result of an inaccurate³ perception of the condition of body or mind despite the absence of an actual medical diagnosis⁴. 

这种让人衰弱的症状是由于尽管缺乏确实的医疗诊断，但对个人的身体或精神状况认识不准确。

 

An individual suffering from hypochondriasis is known as a hypochondriac. 

患有疑病症的人就称为疑病患者。