Somatoform disorder is a type of mental illness characterized by physical symptoms without any underlying medical condition. Some synonyms that can be used to describe this disorder include somatic symptom disorder, functional somatic syndrome, and medically unexplained symptoms. Other related terms include hypochondriasis, which refers to excessive worry about having a serious illness, and conversion disorder, which involves physical symptoms that cannot be explained by medical tests and may have a psychological origin. People with somatoform disorders may often feel misunderstood or dismissed by healthcare providers, and may benefit from a multidisciplinary approach that includes psychological and medical support.