Request an Appointment



Contact us with Questions

Live Chat hours:  M-F 9 a.m. - 3 p.m. ET

Expand Content

Diseases & Conditions

Munchausen Syndrome by Proxy

(Also Called 'Munchausen Syndrome by Proxy - Type')

What is Munchausen syndrome by proxy?

Munchausen syndrome by proxy (MSP), a type of factitious disorder, is a mental illness in which a person acts as if an individual he or she is caring for has a physical or mental illness when the person is not really sick. The adult perpetrator has MSP and directly produces or lies about illness in another person under his or her care, usually a child under 6 years of age. It is considered a form of abuse by the American Professional Society on the Abuse of Children. However, cases have been reported of adult victims. (The term "by proxy" means "through a substitute.")

People with MSP have an inner need for the other person (often his or her child) to be seen as ill or injured. It is not done to achieve a concrete benefit, such as financial gain. People with MSP are even willing to have the child or patient undergo painful or risky tests and operations in order to get the sympathy and special attention given to people who are truly ill and their families. Factitious disorders are considered mental illnesses because they are associated with severe emotional difficulties.

The Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (Text Revision DSMIV-TR), which is the standard reference book for recognized mental illnesses in the United States, organizes factitious disorders into four main types: those with mainly psychological symptoms; those with mainly physical symptoms; those with both physical and psychological symptoms; and those that do not match the conditions for the other three types. MSP falls into the fourth category. Fortunately, it is rare (2 out of 100,000 children).

MSP most often occurs with mothers—although it can occur with fathers—who intentionally harm or describe non-existent symptoms in their children to get the attention given to the family of someone who is sick. A person with MSP uses the many hospitalizations as a way to earn praise from others for her devotion to the child’s care, often using the sick child as a means for developing a relationship with the doctor or other health care provider. The adult with MSP often will not leave the bedside and will discuss in medical detail symptoms and care provided as evidence that he or she is a good caretaker. If the symptoms go away in the hospital, they are likely to return when the caretaker with MSP is alone with the child or elderly parent.

People with MSP might create or exaggerate the child’s symptoms in several ways. They might simply lie about symptoms, alter diagnostic tests (such as contaminating a urine sample), falsify medical records, or induce symptoms through various means, such as poisoning, suffocating, starving, and causing infection. The presenting problem may also be psychiatric or behavioral.

What are the symptoms of Munchausen syndrome by proxy?

Certain characteristics are common in a person with MSP:

  • Often is a parent, usually a mother, but can be the adult child of an elderly patient
  • Might be a health care professional
  • Is very friendly and cooperative with the health care providers
  • Appears quite concerned (some might seem overly concerned) about the child or designated patient
  • Might also suffer from Munchausen syndrome (This is a related disorder in which the caregiver repeatedly acts as if he or she has a physical or mental illness when he or she has caused the symptoms.)

Other possible warning signs of MSP in children include the following:

  • The child has a history of many hospitalizations, often with a strange set of symptoms.
  • Worsening of the child’s symptoms generally is reported by the mother and is not witnessed by the hospital staff.
  • The child’s reported condition and symptoms do not agree with the results of diagnostic tests.
  • There might be more than one unusual illness or death of children in the family.
  • The child’s condition improves in the hospital, but symptoms recur when the child returns home.
  • Blood in lab samples might not match the blood of the child.
  • There might be signs of chemicals in the child’s blood, stool, or urine.

What causes Munchausen syndrome by proxy?

The exact cause of MSP is not known, but researchers believe both biological and psychological factors play a role in the development of this disorder. Some theories suggest that a history of abuse or neglect as a child or the early loss of a parent might be factors in its development. Some evidence suggests that major stress, such as marital problems, can trigger an MSP episode.

How common is Munchausen syndrome by proxy?

There are no reliable statistics regarding the number of people in the United States who suffer from MSP, and it is difficult to assess how common the disorder is because many cases go undetected. However, estimates suggest that about 1,000 of the 2.5 million cases of child abuse reported annually are related to MSP.

In general, MSP occurs more often in women than in men.

How is Munchausen syndrome by proxy diagnosed?

Diagnosing MSP is very difficult because of the dishonesty that is involved. Doctors must rule out any possible physical illness as the cause of the child’s symptoms, and often use a variety of diagnostic tests and procedures before considering a diagnosis of MSP.

If a physical cause of the symptoms is not found, a thorough review of the child’s medical history, as well as a review of the family history and the mother’s medical history (many have Munchausen syndrome themselves) might provide clues to suggest MSP. Often, the individual with MSP may have other comorbid psychiatric disorders. Remember, it is the adult, not the child, who is diagnosed with MSP. Indeed, the most important or helpful part of the workup is likely to be the review of all old records that can be obtained. Too often, this time-consuming but critical task is forgotten and the diagnosis is missed.

How is Munchausen syndrome by proxy treated?

The first concern in cases of MSP is to ensure the safety and protection of any real or potential victims. This might require that the child be placed in the care of another. In fact, managing a case involving MSP often requires a team that includes social workers, foster care organizations, and law enforcement, as well as the health care providers.

Successful treatment of people with MSP is difficult because those with the disorder often deny there is a problem. In addition, treatment success is dependent on the person telling the truth, and people with MSP tend to be such accomplished liars that they begin to have trouble telling fact from fiction.

Psychotherapy (a type of counseling) generally focuses on changing the thinking and behavior of the individual with the disorder (cognitive-behavioral therapy). The goal of therapy for MSP is to help the person identify the thoughts and feelings that are contributing to the behavior, and to learn to form relationships that are not associated with being ill.

What are the complications of Munchausen syndrome by proxy ?

This disorder can lead to serious short- and long-term complications, including continued abuse, multiple hospitalizations, and the death of the victim. (Research suggests that the death rate for victims of MSP is about 10 percent.) In some cases, a child victim of MSP learns to associate getting attention to being sick and develops Munchausen syndrome himself or herself. Considered a form of child abuse, MSP is a criminal offense.

What is the prognosis (outlook) for people with Munchausen syndrome by proxy?

In generally, MSP is a very difficult disorder to treat and often requires years of therapy and support. Social services, law enforcement, children’s protective services, and physicians must function as a team to stop the behavior.

Can Munchausen syndrome by proxy be prevented?

There is no known way to prevent this disorder. However, it might be helpful to begin treatment in people as soon as they begin to have symptoms. Removing the child or other victim from the care of the person with MSP can prevent further harm to the victim.


Stirling J. Beyond Munchausen Syndrome by Proxy: Identification and Treatment of Child Abuse in a Medical Setting, Pediatrics. 2007;119:1026-1030. Accessed December 22, 2010.

Endom EE. Munchausen syndrome by proxy. Accessed December 22, 2010.

© Copyright 1995-2010 The Cleveland Clinic Foundation. All rights reserved.

Can't find the health information you’re looking for?

This information is provided by the Cleveland Clinic and is not intended to replace the medical advice of your doctor or health care provider. Please consult your health care provider for advice about a specific medical condition. This document was last reviewed on: 12.2.2010...#9834