Schizoid Personality Disorder: Symptoms, Causes, Diagnosis and Treatment Explained
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Schizoid personality disorder (SPD) is a mental health condition marked by very little interest in or ability to form relationships with other people, along with difficulty expressing a full range of emotions. [1] It is less common than other personality disorders but more common than schizophrenia, and its exact cause is unknown. [1] Symptoms usually begin in young adulthood and can overlap with avoidant personality disorder, autism spectrum conditions and early schizophrenia. [1] Cognitive behavioral therapy and group therapy can help people build social skills and closer relationships, while medicines are used mainly to treat conditions that occur alongside SPD, such as anxiety or depression. [2]
Quick Answer: What is schizoid personality disorder?
Schizoid personality disorder is a condition in which a person shows very little interest in, or ability to form, relationships with other people and finds it very hard to express a full range of emotions. Signs include wanting to be alone and seeming cold. Talk therapy, especially cognitive behavioral therapy, and group therapy can help.
What the research says
Schizoid traits tend to persist. A systematic review and meta-analysis of 40 studies covering 38,432 participants found that personality disorders are only moderately stable over time (56.7% kept a diagnosis of any personality disorder at follow-up), and that, unlike most personality disorder criteria, schizoid criteria did not decrease significantly from baseline to follow-up (d'Huart et al., Clinical Psychology Review, 2023) [3].
People with SPD rarely seek help, and the risks can be underestimated. A clinical mini-review reported that individuals with SPD rarely present for treatment because their isolation is often comfortable to them, and that schizoid traits appear to be a major risk factor for completed suicide and serious suicide attempts, so the authors recommend clinicians assess for them (Attademo et al., Psychiatria Danubina, 2021) [4].
Personality disorders as a group are common and linked to higher mortality. A systematic review of 60 studies across 28 countries, covering all personality disorder types including schizoid, estimated a pooled prevalence of any personality disorder of 4.1% in low- and middle-income countries and 5.2% in high-income countries, with a pooled standardized mortality ratio of 1.8 for outpatients and 4.7 for inpatients (Shadid et al., The Lancet Psychiatry, 2025) [5].
What Is Schizoid Personality Disorder?
Schizoid personality disorder is a condition where a person shows very little, if any, interest and ability to form relationships with other people. It is very hard for the person to express a full range of emotions. [1]
If you have schizoid personality disorder, you may be seen as keeping to yourself or rejecting others. You may not be interested in or able to form close friendships or romantic relationships. Because you do not tend to show emotion, it may appear that you do not care about others or what is going on around you. [1]
Schizoid personality disorder is less common than other personality disorders, but it is much more common than schizophrenia. [1] The cause is not known. [1] Some symptoms of schizoid personality disorder are similar to autism spectrum disorders, other personality disorders — especially avoidant personality disorder — and early symptoms of schizophrenia. [1]
Talk therapy, also called psychotherapy, can help those who know they need to improve relationships with others. But it is common to feel unsure about change. Medicines are mainly used to treat mental health conditions that occur along with schizoid personality disorder, rather than the disorder itself. [1]
Key fact | What it means |
Core feature | Very little interest in or ability to form relationships |
Emotional expression | Hard to express a full range of emotions |
How it looks to others | Keeping to yourself, seeming cold or uncaring |
How common | Less common than other personality disorders; more common than schizophrenia |
Cause | Not known — genes and surroundings may play a role |
Main treatment | Talk therapy (CBT) and group therapy; medicines only for related conditions |
What are the symptoms of schizoid personality disorder?
If you have schizoid personality disorder, you are likely to want to be alone and to do activities alone. You do not want or enjoy close relationships, and you feel little if any desire for sexual relationships. [1]
You take pleasure in few activities, if any, and find it hard to express your emotions and react. You may lack humor or not be interested in others, or you may be cold toward others. You may lack the drive that makes you want to reach goals, and you do not react to praise or criticism from others. [1]
Because of these patterns, people may view you as odd or unusual. [1]
Symptom area | What it looks like in daily life |
Social life | Wants to be alone; does not want or enjoy close relationships |
Romance | Little if any desire for sexual relationships |
Emotions | Hard to express emotions and react; may seem cold or humorless |
Interests | Takes pleasure in few activities, if any |
Motivation | May lack the drive to reach goals |
Feedback | Does not react to praise or criticism from others |
When the symptoms start
Schizoid personality disorder most often begins when a person is a young adult. But some symptoms might be noticed during childhood. [1]
These symptoms may make it hard to do well in school, at work, in social situations or in other areas of life. However, the person may do well if the job can be done by mostly working alone. [1]
How is schizoid personality disorder different from schizophrenia?
Although the names may sound alike, schizoid personality disorder, schizotypal personality disorder and schizophrenia spectrum disorders are all different types of mental health conditions. But they can have similar symptoms, such as not being able to make social connections or show a full range of emotions. [1]
In contrast to schizotypal personality disorder and schizophrenia, people with schizoid personality disorder are in touch with reality. They are not likely to feel paranoid, hold bizarre beliefs or hallucinate. [1] They make sense when speaking — although the tone may not be lively, the content of the person's speech is not strange or hard to follow. [1]
Feature | Schizoid personality disorder | Schizotypal personality disorder / Schizophrenia spectrum |
Contact with reality | In touch with reality | May lose touch with reality |
Paranoia and bizarre beliefs | Not likely | More likely |
Hallucinations | Not likely | Possible |
Speech | Makes sense, though tone may be flat | May be strange or hard to follow |
Social connection | Hard to form, by preference | Hard to form, with other thought disturbances |
When should you see a doctor about schizoid personality disorder?
People with schizoid personality disorder typically only seek treatment for a related problem, such as depression. [1]
If someone close to you has urged you to seek help for symptoms common to schizoid personality disorder, make an appointment with a doctor or another health care professional, or a mental health professional. If you or someone you know has thoughts of suicide, call or text 988 (Suicide and Crisis Lifeline in the U.S.) or your local emergency number right away.
If you suspect a loved one may have schizoid personality disorder, gently suggest that the person seek help. You can offer to go along to the first appointment. [1]
Situation | Recommended action |
A doctor or professional is urging help | Make an appointment with a health care or mental health professional |
You suspect a loved one has SPD | Gently suggest seeking help; offer to attend the first appointment |
Treatment is sought for a related problem | Discuss SPD symptoms at that same appointment (depression is common) |
What causes schizoid personality disorder?
Personality is the blend of thoughts, emotions and behaviors that makes you special. It is the way you view, understand and relate to the outside world. It is also how you see yourself. Personality forms when you are a child. It is shaped through a blend of your surroundings and genes passed down from your parents. [1]
Children typically learn over time to properly understand social cues and take action. What causes schizoid personality disorder to happen is not known. But a blend of your surroundings and genes passed down to you may play a role in developing the disorder. [1]
Possible contributing factor | How it may play a role |
Genes | Traits and risks passed down from parents |
Childhood surroundings | The environment in which personality forms |
Social learning | Children learn over time to read social cues; this process may go differently in SPD |
Exact cause | Not known |
What are the risk factors for schizoid personality disorder?
Having a family history of certain conditions raises the risk of schizoid personality disorder.
A family history of schizoid personality disorder, schizotypal personality disorder or schizophrenia in a parent or other relative is a known risk factor. [1] The childhood environment also matters.
Risk factor | What it means |
Family history | A parent or relative with SPD, schizotypal personality disorder or schizophrenia |
Cold or neglectful parenting | A parent who was cold, did not properly care for you and did not take action to help you emotionally |
What complications can schizoid personality disorder cause?
People with schizoid personality disorder are at higher risk of other mental health conditions developing over time.
Schizotypal personality disorder or schizophrenia may develop. [1] Other personality disorders, major depression and anxiety disorders are also more likely. [1]
Possible complication | Description |
Schizotypal personality disorder or schizophrenia | SPD raises the risk of these related conditions |
Other personality disorders | Additional personality disorder patterns may develop |
Major depression | Risk of depression is higher |
Anxiety disorders | Risk of anxiety disorders is higher |
Because no specific cause is known, there is no proven way to prevent schizoid personality disorder. Recognizing risk factors such as family history and seeking early support for emotional or social difficulties may help, but the condition itself cannot currently be prevented.
How is schizoid personality disorder diagnosed?
You may have a physical exam to rule out other medical health problems. [2] Then your primary care doctor may suggest that you see a mental health professional.
To find out if you have schizoid personality disorder, your mental health professional will talk with you about your symptoms and ask several questions. Your mental health professional likely will also go over your medical and personal history. [2]
Step | What happens |
Physical exam | Rules out other medical health problems |
Referral | Primary care doctor may suggest seeing a mental health professional |
Discussion | Mental health professional talks about your symptoms and asks questions |
History review | Medical and personal history are reviewed |
What are the treatment options for schizoid personality disorder?
If you have schizoid personality disorder, you may want to go your own way and not talk to others, including your doctor or other health care professionals. You may be so used to a life of not being close to anyone emotionally that you are not sure you want to change — or that you can.
You might agree to start treatment only when a relative or friend who is concerned about you urges you to do so. [2] But working with a mental health professional who knows how to treat schizoid personality disorder can make your life much better.
With proper treatment and a skilled therapist, you can make a lot of progress and improve your quality of life.
Talk therapy
If you would like to build closer relationships, forms of cognitive behavioral therapy may help you change the beliefs and behaviors that cause problems in your relationships. [2]
A therapist knows that you need support to explore your relationships and how hard it can be to open up about your inner life. Therapists listen to you and help you work toward goals that you identify for yourself.
Group therapy
In a group setting, you can learn how to talk with others who are also learning and practicing new social skills. In time, group therapy may provide the support needed to make your social skills better. [2]
Medicines
There is no specific drug to treat schizoid personality disorder. [2] But certain drugs can help with issues such as anxiety or depression. [2]
Treatment | What it does |
Talk therapy (CBT) | Helps change beliefs and behaviors that cause problems in relationships; therapist works toward goals you identify |
Group therapy | Lets you practice talking and social skills with others; builds support over time |
Medicines | No drug treats SPD itself; medicines can help anxiety or depression that occurs alongside it |
How can people cope with schizoid personality disorder?
Living with schizoid personality disorder can feel confusing — both for the person experiencing it and for the people who care about them. It is common to feel unsure about change or whether change is even possible. That hesitation is normal, and it is part of the condition itself.
Gentle encouragement from a relative or friend often helps a person agree to try treatment. Working with a mental health professional who understands SPD makes a meaningful difference. Therapists who know this condition understand how hard it is to open up about inner life, and they move at the pace that feels safe.
Progress is real and possible. With proper treatment and a skilled therapist, you can make a lot of progress and improve your quality of life.
How should you prepare for a schizoid personality disorder appointment?
You are likely to start by contacting your primary care doctor. In some cases, when calling to set up an appointment, a mental health professional may be suggested right away.
Take a family member or friend along, if possible. With your OK, someone who has known you for a long time may be able to answer questions or share information with the doctor that you do not think to bring up.
What you can do
Before your appointment, make a list of any symptoms you or your family noticed and for how long. Ask friends or relatives if they have been worried about your behavior and what they have seen.
Include key personal information, including events that have caused distress in the past and any major stressors. Find out about your family's medical history, including any history of mental health problems.
Also list your medical information, including other physical or mental health problems you have, and all medicines you take — including the names and doses of any medicines, herbs, vitamins or other supplements.
Finally, prepare questions to ask your doctor or mental health professional to make the most of your appointment.
Before your visit, list | Examples |
Symptoms and duration | What you or family noticed, and for how long |
Key personal information | Distressing past events, major stressors, family mental health history |
Medical information | Other physical or mental health problems |
All medicines | Names and doses of medicines, herbs, vitamins, supplements |
Questions to ask | Likely causes, treatments, side effects, expected improvement |
Questions to ask your doctor
Some basic questions to ask include: What is likely causing my symptoms or condition? What are other possible causes? Is my condition likely short term or long term? What treatments are most likely to help me?
If you suggest medicine, what are the possible side effects? Is there a generic alternative to the medicine you are prescribing? How much can I expect my symptoms to improve with treatment?
I have other health conditions. How can I best manage them together? Are there brochures or other printed materials that I can have? What websites do you recommend?
Do not hesitate to ask any other questions during your appointment.
What to expect from your doctor
Your doctor or mental health professional is likely to ask you several questions. Be ready to answer them to make sure there is time to go over points you want to focus on.
Your doctor may ask what problems or symptoms you are worried about, and whether your symptoms get worse at certain times — and if so, when, and how you handle it when that happens.
Other likely questions include whether you have close friends or family, and if not, whether that bothers you; how you would describe yourself; and whether you often choose to do things by yourself.
You may also be asked whether you share your thoughts with anyone outside your immediate family, what you like to do in your free time, and whether you have ever thought about harming yourself or others — or acted on it.
Finally, your doctor may ask whether family members or friends have been worried about your behavior, whether any close relatives have been treated for mental health conditions, and whether you drink alcohol or use drugs — and how often.
Likely doctor questions | Why they ask |
What symptoms worry you? Do they worsen at certain times? | Understand pattern and severity |
Do you have close friends or family? Does that bother you? | Gauge impact of social disconnection |
Do you often choose to do things alone? | Assess preference for solitude |
Do you share thoughts outside your family? What do you do for fun? | Gauge range of interests and connection |
Any thoughts of harming yourself or others? | Assess safety |
Family history of mental health conditions? Alcohol or drug use? | Look for risk factors and co-occurring issues |
Conclusion
Schizoid personality disorder is a genuine and treatable condition — not simply a personality quirk or extreme introversion. It is defined by very little interest in or ability to form relationships and by difficulty expressing a full range of emotions. While it shares a name with schizophrenia, people with SPD stay in touch with reality and do not hallucinate or hold bizarre beliefs. The condition most often begins in young adulthood, and its exact cause is unknown. Talk therapy and group therapy can help build closer relationships and stronger social skills, and with proper treatment and a skilled therapist, meaningful progress and a better quality of life are within reach.
Next step: If you or someone you care about shows these patterns, a conversation with a doctor or mental health professional is the best first step.
If you found this guide helpful, explore our related resource on personality disorders for more practical mental health information.
Frequently Asked Questions
What is schizoid personality disorder?
Schizoid personality disorder (SPD) is a condition where a person shows very little interest in, or ability to form, relationships with other people. It is very hard for the person to express a full range of emotions, and they may appear cold or indifferent to others.
What are the symptoms of schizoid personality disorder?
People with SPD typically want to be alone, do not want or enjoy close relationships, feel little desire for sexual relationships, take pleasure in few activities, find it hard to express emotions, seem cold or humorless, and do not react to praise or criticism.
Is schizoid personality disorder the same as schizophrenia?
No. Although the names sound alike, they are different conditions. People with SPD are in touch with reality, are not likely to feel paranoid or hallucinate, and their speech makes sense — although the tone may be flat.
Is schizoid personality disorder the same as introversion?
Not the same. SPD is a diagnosed condition that makes it hard to form relationships and express emotions, and it can impair school, work, and social life. Introversion is a normal personality trait without impairment.
How is schizoid personality disorder diagnosed?
A physical exam may first rule out other medical problems. Then a mental health professional discusses your symptoms, asks questions, and reviews your medical and personal history.
What causes schizoid personality disorder?
The exact cause is not known. Personality forms in childhood through a blend of surroundings and genes, and this combination may play a role in developing the disorder.
Who is at risk for schizoid personality disorder?
Risk is higher with a family history of SPD, schizotypal personality disorder, or schizophrenia, and with a parent who was cold, neglectful, or did not help you emotionally.
Can schizoid personality disorder be cured?
There is no cure, but treatment helps. With cognitive behavioral therapy, group therapy, and a skilled therapist, people can make meaningful progress and improve their quality of life.
Does medication treat schizoid personality disorder?
No specific drug treats SPD itself. Medicines may be prescribed to help with related conditions such as anxiety or depression that occur alongside SPD.
Will a person with SPD ever want treatment?
People with SPD may only seek help when a relative or friend urges them, or when a related problem like depression develops. Gentle encouragement and the right therapist can make starting treatment possible.
What complications can schizoid personality disorder cause?
People with SPD face higher risk of schizotypal personality disorder or schizophrenia, other personality disorders, major depression, and anxiety disorders.
Helpful Resources
Related Reading
What Are Cluster A Personality Disorders? Symptoms, Causes, Diagnosis and Treatment explains the group of personality disorders that includes schizoid personality disorder.
Schizotypal Personality Disorder: Complete Guide to the Signs, Causes, and Treatment covers a related personality disorder with odd beliefs and social distance.
Cognitive Behavioral Therapy (CBT): What It Is, What It Treats and What to Expect explains the talk therapy often used to treat schizoid personality disorder.
Paranoid Personality Disorder (PPD): Symptoms, Causes, and Management covers another cluster A disorder marked by distrust of others.
References
Mayo Clinic Staff. Schizoid personality disorder: Symptoms and causes. Mayo Clinic. May 27, 2023. https://www.mayoclinic.org/diseases-conditions/schizoid-personality-disorder/symptoms-causes/syc-20354414
Mayo Clinic Staff. Schizoid personality disorder: Diagnosis and treatment. Mayo Clinic. May 27, 2023. https://www.mayoclinic.org/diseases-conditions/schizoid-personality-disorder/diagnosis-treatment/drc-20354419
d'Huart D, Seker S, Bürgin D, et al. The stability of personality disorders and personality disorder criteria: a systematic review and meta-analysis. Clinical Psychology Review. 2023;102:102284. PMID 37116251. https://doi.org/10.1016/j.cpr.2023.102284
Attademo L, Bernardini F, Spatuzzi R. Suicidality in individuals with schizoid personality disorder or traits: a clinical mini-review of a probably underestimated issue. Psychiatria Danubina. 2021;33(3):261-265. PMID 34795159. https://doi.org/10.24869/psyd.2021.261
Shadid J, Ferrari AJ, Bach B, et al. The global epidemiology of personality disorder: a systematic review and meta-regression. The Lancet Psychiatry. 2025;12(12):932-946. PMID 41197646. https://doi.org/10.1016/S2215-0366(25)00299-8
Medical disclaimer
The information provided in this article is for educational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
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