A hypochondriast is someone who is overly concerned with their health and is constantly worried about having a serious illness. There are several synonyms that can be used interchangeably with the word hypochondriast, including health anxiety sufferer, somatic symptom disorder patient, illness worrier, and self-diagnoser. These terms all refer to an individual who is persistently concerned about their health despite reassurance from medical professionals. People who exhibit hypochondriasis may constantly seek medical attention and undergo unnecessary medical procedures due to their persistent health anxiety. Understanding these alternative terms can help medical professionals and loved ones better understand and communicate with those who suffer from hypochondriasis.