Types of Somatoform Disorder: Physical Symptoms with a Psychological Root
The main types of somatoform disorder, now called somatic symptom and related disorders, explained in plain language: what each one is, how they cause real physical symptoms, and how they connect to anxiety, depression, and substance use.
Clinically reviewed by Dr. Ponlawat Pitsuwan, Physician and Addiction Medicine Specialist, Phuket Island Rehab.
Somatoform disorders, now grouped in modern diagnosis as somatic symptom and related disorders, are mental health conditions in which a person experiences real physical symptoms or intense health-related distress that cannot be fully explained by a medical condition and are linked to psychological factors. The main types are somatic symptom disorder, where excessive thoughts and anxiety focus on physical symptoms; illness anxiety disorder, the preoccupation with having a serious illness once called hypochondria; conversion disorder, also called functional neurological symptom disorder, where neurological symptoms such as weakness, paralysis, or seizures arise without a physical cause; and factitious disorder, where a person feigns or induces illness. Pain disorder, focused on distressing pain, is also included. The symptoms are genuinely experienced, not imagined or faked, except in factitious disorder. These conditions commonly overlap with anxiety, depression, and substance use, and they are treated with therapy and, where needed, treatment of co-occurring conditions.
What somatoform disorders are
Somatoform disorders are a group of mental health conditions in which psychological distress shows up as physical symptoms or as intense, excessive concern about health. The term comes from soma, meaning body, and reflects the way these conditions express themselves through the body rather than only through mood or thought. In current diagnostic systems the older category of somatoform disorders has been reorganised and renamed somatic symptom and related disorders, but the underlying idea is the same: real physical experiences and health worries that are driven, at least in part, by psychological factors rather than by an identifiable medical disease.
The most important point to understand, and the one most often misunderstood, is that the symptoms are usually genuine. A person with a somatoform disorder is not imagining their pain or faking their symptoms; they really feel them, and the distress is real. The difference is that the symptoms are not fully explained by a medical condition and are connected to psychological processes such as anxiety, stress, or trauma. This is why these conditions sit within mental health care, and why dismissing them as all in the head is both inaccurate and unhelpful. The one exception is factitious disorder, described below, where symptoms are deliberately produced.
The main types
Several distinct conditions fall under the somatoform or somatic symptom umbrella, each with its own pattern. The table below summarises the main types, and the sections that follow explain each in more detail. What they share is the presence of physical symptoms or health-related distress linked to psychological factors, with significant impact on the person’s life.
| Type | Core feature | Example |
|---|---|---|
| Somatic symptom disorder | Excessive thoughts, anxiety, and time devoted to real physical symptoms | Persistent worry and distress about ongoing pain or fatigue |
| Illness anxiety disorder | Preoccupation with having a serious illness, with few or no symptoms | Constant fear of cancer despite reassurance, once called hypochondria |
| Conversion disorder | Neurological symptoms with no physical cause | Sudden weakness, paralysis, blindness, or non-epileptic seizures |
| Pain disorder | Distressing pain strongly linked to psychological factors | Chronic pain that does not match physical findings |
| Factitious disorder | Deliberately feigning or inducing illness | Faking or causing symptoms to take on the sick role |
Somatic symptom disorder
Somatic symptom disorder is the central condition in this group. A person has one or more real, distressing physical symptoms, such as pain, fatigue, or digestive problems, and responds to them with excessive thoughts, feelings, and behaviours: spending a great deal of time and anxiety on the symptoms, fearing the worst about their meaning, and repeatedly seeking medical care or reassurance. The symptoms may or may not be associated with a diagnosed medical condition; what defines the disorder is the disproportionate distress and preoccupation, which themselves interfere with the person’s life.
This condition often leads to repeated doctor visits, tests, and procedures that do not resolve the distress, because the underlying driver is psychological rather than a missed physical disease. The anxiety about the symptoms can become a constant focus that crowds out other parts of life. Recognising somatic symptom disorder matters because the most helpful response is not yet more medical testing but treatment that addresses the anxiety and distress, while still taking the physical symptoms seriously and managing any genuine medical contributors.
Illness anxiety disorder
Illness anxiety disorder, historically known as hypochondria or hypochondriasis, is a preoccupation with the fear of having or developing a serious illness, in a person who has few or no actual physical symptoms. The defining feature is the health anxiety itself rather than the symptoms. A person might interpret normal body sensations as signs of a grave disease, research illnesses obsessively, and either seek constant medical reassurance, which never lasts, or avoid medical care entirely out of fear of what might be found.
Illness anxiety disorder is closely related to anxiety disorders and can be deeply disruptive, dominating a person’s thoughts and relationships and consuming time and money on unnecessary appointments and tests. As with somatic symptom disorder, reassurance from doctors provides only brief relief before the fear returns, which is why the condition responds far better to psychological treatment that addresses the anxiety than to repeated medical investigation. Understanding it as a recognised, treatable anxiety-related condition, rather than as attention-seeking, is the first step to helping.
Conversion disorder
Conversion disorder, also called functional neurological symptom disorder, involves neurological symptoms, such as weakness, paralysis, tremor, difficulty speaking or swallowing, blindness, or seizures, that are real and genuinely experienced but are not explained by a neurological disease. The symptoms are thought to arise from the way the brain is functioning rather than from structural damage, and they are often linked to psychological stress or trauma, sometimes appearing after a distressing event. The non-epileptic seizures seen in this condition can look like epileptic seizures but do not show the same electrical brain activity.
It is crucial to understand that conversion disorder is not faking. The person is not in control of the symptoms and is not producing them deliberately, which distinguishes it sharply from factitious disorder. The symptoms are a genuine, involuntary manifestation of distress through the nervous system. Diagnosis requires careful medical assessment to rule out neurological disease, and treatment typically combines neurology and mental health care, including physiotherapy for physical symptoms and psychological therapy to address the underlying stress or trauma.
Pain disorder and factitious disorder
Pain disorder, in older classifications, describes distressing, persistent pain in which psychological factors play a significant role in the onset, severity, or maintenance of the pain. The pain is real and genuinely felt, but it cannot be fully explained by a physical cause, or it is out of proportion to any identifiable one. In current systems this often falls under somatic symptom disorder with predominant pain. As with the other conditions, the pain deserves to be taken seriously, and treatment addresses both the physical experience and the psychological factors involved.
Factitious disorder is the exception within this group, because here the symptoms are deliberately produced. A person with factitious disorder feigns, exaggerates, or even induces illness or injury in themselves, not for an external reward such as money, but because of a psychological need to take on the sick role and receive care and attention. A related form involves producing illness in another person, often someone in one’s care. Factitious disorder is a serious mental health condition in its own right, distinct from the other somatoform conditions in that the symptoms are intentionally created, and it requires specialist psychological treatment.
How somatoform disorders connect to mental health and substance use
Somatoform and somatic symptom disorders rarely occur alone. They are strongly associated with anxiety and depression, which is unsurprising given that the conditions are, at their core, expressions of psychological distress through the body. The constant worry, repeated medical visits, and disruption to life can both stem from and feed into anxiety and low mood, and treating these co-occurring conditions is usually part of helping the person recover. This is why care for somatoform disorders sits within broader mental health treatment rather than being purely a matter for physical medicine.
Substance use is also relevant. People living with chronic physical symptoms, persistent pain, and high health anxiety may turn to alcohol, prescription painkillers, or other substances to cope with the distress or the pain, which can lead to dependence over time. Pain-focused conditions in particular can intersect with opioid use, and health anxiety with alcohol or sedative use. Because of these overlaps, a thorough assessment looks at the whole picture, the physical symptoms, the psychological factors, any co-occurring anxiety or depression, and any substance use, so that all of them can be addressed together.
When substance use has become more than occasional
If you are living with distressing physical symptoms or health anxiety and have found yourself using alcohol, painkillers, or other substances to cope, that is an important signal that two things need attention together. Using a substance to quiet pain or to numb the anxiety about illness is understandable, but it tends to deepen both the distress and the risk of dependence over time, and self-medicating a somatoform or anxiety condition rarely helps for long. Recognising when coping has become a substance problem is part of getting the right help.
If this resonates, it is worth seeking help that treats the whole picture rather than one part of it. Anyone who is physically dependent on alcohol or benzodiazepines, or who has become dependent on prescription painkillers, should not stop suddenly without medical advice, because some withdrawals can be dangerous. Somatoform disorders, anxiety, depression, and substance use are all treatable, and addressing them together, with therapy and the right medical support, offers the best chance of relief from symptoms that can otherwise dominate a person’s life.
Summary
Somatoform disorders, now grouped as somatic symptom and related disorders, are mental health conditions in which real physical symptoms or intense health-related distress are driven, at least in part, by psychological factors rather than by an identifiable medical disease. The main types are somatic symptom disorder, with excessive thoughts and anxiety about real symptoms; illness anxiety disorder, the preoccupation with having a serious illness once called hypochondria; conversion disorder, with genuine neurological symptoms that have no physical cause; pain disorder, focused on distressing pain; and factitious disorder, where symptoms are deliberately produced. Except in factitious disorder, the symptoms are genuinely experienced, not imagined or faked. These conditions commonly overlap with anxiety, depression, and substance use, and they are treated with psychological therapy and, where needed, treatment of co-occurring conditions, while still taking the physical symptoms seriously.
As Dr. Ponlawat Pitsuwan, addiction medicine specialist at Phuket Island Rehab, puts it, “The cruelest myth about these conditions is that the symptoms are not real. They are entirely real to the person, and being told it is all in your head only adds shame to suffering. What I see, again and again, is someone who has been through every scan, found no answer, and started drinking or using painkillers to cope. Treating the distress underneath, and the substance use it led to, is what finally helps.”
Frequently asked questions
What are the types of somatoform disorder?
The main types are somatic symptom disorder, with excessive thoughts and anxiety focused on real physical symptoms; illness anxiety disorder, the preoccupation with having a serious illness once called hypochondria; conversion disorder, with genuine neurological symptoms such as weakness, paralysis, or non-epileptic seizures that have no physical cause; pain disorder, focused on distressing pain linked to psychological factors; and factitious disorder, where a person deliberately feigns or induces illness. In current diagnosis these fall under somatic symptom and related disorders.
Are somatoform symptoms real or imagined?
They are real. Except in factitious disorder, where symptoms are deliberately produced, people with somatoform disorders genuinely experience their physical symptoms and distress; they are not imagining or faking them. The difference is that the symptoms are not fully explained by a medical disease and are linked to psychological factors such as anxiety, stress, or trauma. Telling someone it is all in their head is both inaccurate and unhelpful.
What is the difference between somatic symptom disorder and illness anxiety disorder?
In somatic symptom disorder, a person has one or more real, distressing physical symptoms and responds with excessive anxiety, thoughts, and behaviour around them. In illness anxiety disorder, formerly hypochondria, the person has few or no actual symptoms but is preoccupied with the fear of having or developing a serious illness. The first centres on the symptoms themselves; the second centres on the fear of illness.
Is conversion disorder the same as faking?
No. Conversion disorder, also called functional neurological symptom disorder, involves genuine, involuntary neurological symptoms such as weakness, paralysis, or non-epileptic seizures that are not under the person’s control and are not produced deliberately. This distinguishes it sharply from factitious disorder, where symptoms are intentionally feigned or induced. Conversion symptoms are a real manifestation of distress through the nervous system and require proper medical and psychological care.
How are somatoform disorders treated?
Treatment centres on psychological therapy, particularly cognitive behavioural therapy, to address the anxiety, distress, and thinking patterns driving the symptoms, while still taking the physical symptoms seriously and managing any genuine medical contributors. Conversion disorder often also involves physiotherapy, and co-occurring anxiety or depression is treated alongside. Repeated medical testing tends not to help and can reinforce the preoccupation, so the focus is on addressing the underlying psychological factors.
Do somatoform disorders involve substance use?
They can. People living with chronic symptoms, persistent pain, and high health anxiety may turn to alcohol, prescription painkillers, or other substances to cope, which can lead to dependence over time, with pain-focused conditions intersecting with opioid use in particular. Because of these overlaps, good assessment and treatment address the physical symptoms, the psychological factors, any co-occurring anxiety or depression, and any substance use together rather than separately.
Sources
National Institute of Mental Health (NIMH). Mental Health Topics. https://www.nimh.nih.gov/health/topics
National Health Service (NHS). Medically Unexplained Symptoms. https://www.nhs.uk/conditions/medically-unexplained-symptoms/
Substance Abuse and Mental Health Services Administration (SAMHSA). Co-Occurring Disorders. https://www.samhsa.gov/medications-substance-use-disorders/co-occurring-disorders
National Institute on Drug Abuse (NIDA). Comorbidity: Substance Use and Other Mental Disorders. https://nida.nih.gov/research-topics/comorbidity
National Health Service (NHS). Functional Neurological Disorder. https://www.nhs.uk/conditions/
World Health Organization (WHO). Mental Disorders. https://www.who.int/news-room/fact-sheets/detail/mental-disorders
Types of somatoform disorder — key entities and related terms
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