Munchausen Syndrome by Proxy

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Munchausen Syndrome by Proxy

Topic Overview

What is Munchausen syndrome by proxy?

Munchausen syndrome by proxy (MSBP) is a mental health problem in which a caregiver makes up or causes an illness or injury in a child under his or her care. The caregiver is usually a mother, and the victim is her child. Because children are the victims, MSBP is a form of child abuse.

The caregiver with MSBP may:

  • Lie about the child’s symptoms.
  • Change test results to make a child appear ill.
  • Physically harm the child to produce symptoms.

Victims are most often small children. They may get painful medical tests they don't need. They may even become seriously ill or injured or may die because of the actions of the caregiver.

Children who are victims of MSBP can have lifelong physical and emotional problems and may have Munchausen syndrome as adults. This is a disorder in which a person causes or reports his or her own symptoms.

What causes Munchausen syndrome by proxy?

Doctors aren't sure what causes it, but it may be linked to problems during the abuser's childhood. Abusers often feel like their life is out of control. They often have poor self-esteem and can't deal with stress or anxiety.

The attention that caregivers get from having a sick child may encourage their behaviour. Caregivers may get attention not only from doctors and nurses but also from others in their community. For example, neighbours may try to help the family in many ways—such as by doing chores, bringing meals, or giving money.

How does someone with Munchausen syndrome by proxy act?

A person with MSBP often:

  • Has medical skills or experience.
  • Seems devoted to her child.
  • Looks for sympathy and attention.
  • Tries too hard to become close and friendly with medical staff.
  • Needs to feel powerful and in control.
  • Does not see her behaviour as harmful.

What are the clues that a person may have Munchausen syndrome by proxy?

Doctors or nurses may suspect a problem when:

  • A child has a repeated or unusual illness, and no reason can be found.
  • The child doesn't get better, even with treatments that should help. Symptoms only occur when the caregiver is with or has recently been with the child. But symptoms get better or go away when the caregiver is not there or is being closely watched.
  • The other parent (usually the father) is not involved in the child’s treatment, even though the child's condition may be serious.
  • A caregiver suddenly changes doctors and lies about prior testing and treatment.
  • Normal test results don't reassure the caregiver. And she may be strangely calm or happy when her child’s condition is getting worse.
  • The caregiver is seen (or videotaped or recorded) harming the child or causing symptoms.
  • Another child in the family has had unexplained illness or death.

How is it treated?

Caregivers with Munchausen syndrome by proxy need long-term counselling. They may resist treatment or deny that there is a problem. Medicines are used only when the caregiver has another health problem, such as anxiety disorder, along with MSBP.

Even after treatment, caregivers may repeat their behaviour. So doctors, counsellors, and family members need to closely watch how the caregiver interacts with her children.

For victims, the first step is to protect the child by moving him or her into safe custody. Then a doctor will assess the child. Most of the time, the child’s symptoms stop after the child is away from the caregiver. Some children need counselling or other help.

What should you do if you think someone has Munchausen syndrome by proxy?

MSBP is child abuse. If you suspect that a child is a victim, do not confront the suspected caregiver. This might make the problem worse. Instead, think about these options:

  • Keep a journal of the child’s symptoms and other related events.
  • Talk with your doctor about your concerns.
  • Report your concerns to your local child welfare agency. You can make a report without using your name (anonymous).

Frequently Asked Questions

Learning about Munchausen syndrome by proxy:

Being diagnosed:

Getting treatment:


The following warning signs may alert health professionals that a parent (typically the mother) or caregiver has Munchausen syndrome by proxy (MSBP):

  • A child has a recurring or unusual illness for which no adequate explanation can be found. The parent has the child go through many different tests and evaluations. And the child continually fails to respond to or tolerate medical treatments that in most cases are effective.
  • Symptoms occur or begin only when the caregiver is with or has recently been with the child. Symptoms improve or do not occur when the caregiver is absent.
  • The other parent (usually the father) is noticeably absent. He is uninvolved even though a child's condition may be or appear to be serious.
  • Evidence proves that the parent has given false information to health professionals or others.
  • Normal test results do not reassure the parent. She is inappropriately calm or euphoric when her child's condition is most severe.
  • The caregiver makes an exceptional effort to become friendly and close to medical staff. She may seek medical care for the child from a series of doctors if current relationships become strained.
  • The caregiver is seen or videotaped directly harming the child or causing symptoms.

The discovery that the caregiver has been diagnosed with a similar condition, Munchausen syndrome, in which a person causes or reports symptoms in herself, is also a symptom.

Symptoms in the child who is a victim of Munchausen syndrome by proxy vary, depending on the actions of the abuser. The caregiver may report false symptoms (such as periods of not breathing during sleep, known as apnea), manipulate laboratory samples (such as by adding blood or feces to them), or physically harm the child to produce symptoms. In some cases, the caregiver smothers the child or otherwise causes him or her to stop breathing. The caregiver may also feed or inject the child with substances such as medicines or poisons to cause illness.

Sometimes the caregiver will report symptoms of a behavioural problem or mental health condition such as attention deficit hyperactivity disorder (ADHD) rather than a physical illness.

Sometimes MSBP starts with a child receiving medical attention for a true illness. In order to continue receiving attention from medical personnel, the caregiver may exaggerate, prolong, or produce additional symptoms.

Examinations and Tests

Munchausen syndrome by proxy (MSBP) is diagnosed if the following criteria are met:1

  • Evidence proves that the caregiver is intentionally causing or reporting symptoms in another person under his or her care (a proxy).
  • The caregiver seems to be motivated by involvement with the illness of the person under his or her care.
  • No outside incentives or motivations (such as payment for false medical claims) account for the caregiver causing or reporting illness in the other person.
  • The caregiver is not suffering from any other mental illness.

Doctors who suspect MSBP in a caregiver usually avoid putting the child through unnecessary tests. The child may be admitted to a hospital where he or she is carefully examined and observed. Health professionals also observe first-hand or video-record the caregiver's behaviour as they try to discover whether she is producing the symptoms in her child.

A review of past medical records may provide useful information or show inconsistencies about past examinations, tests, treatments, and even hospital stays that can help determine whether a child's illness is real. But if the offending caregiver has provided false information, medical records can be misleading. Medical records may show that the caregiver has frequently consulted new doctors—the caregiver may change doctors to avoid confrontation with evidence of induced or fabricated illness in the child. In rare cases, a doctor gives in to the parent's demands for a diagnosis and treatment to calm a demanding or threatening parent.

If MSBP is confirmed or highly suspected, health professionals are required by law to file a report with the local health unit or child welfare agency.

Treatment Overview

Child protective services, law enforcement, and doctors are all involved with treatment for Munchausen syndrome by proxy (MSBP). Treatment is very complex and involves the child, the caregiver, and possibly other family members. When a caregiver is known to have MSBP, his or her doctor will need to tell other family members how the illness affects everyone involved. Family members may be asked to support the caregiver and child as much as they can.

The child will be placed in a safe situation, away from the offending caregiver. And doctors will monitor the child for symptoms and will provide counselling. Young children who are victims of MSBP may respond well to play therapy.

A diagnosis of MSBP may be confirmed if the child's symptoms improve or disappear after the child has been separated from the caregiver. A hospital stay may be needed or continued if the child's current symptoms are serious. The child may later be placed in foster care.

Treatment for the caregiver includes a complete physical and psychological examination followed by counselling. The counsellor tries to help the caregiver understand how she has harmed her child. Also, strategies are offered to help the caregiver manage anxiety, stress, self-esteem problems, and problems with feeling in control of her life. Whether the child returns to the caregiver's custody depends on the severity of the case and on the caregiver's response to treatment.

Treatment for the caregiver usually is coordinated through the legal system. Long-term psychotherapy is used to help the caregiver acknowledge and express her need for support, respect, and connection. Dealing with these emotional needs more directly may help prevent her from projecting them onto her child. Therapy also focuses on helping her to develop empathy, so she understands the effect her behaviour has had on her child. Medicines are used as treatment only if another condition, such as anxiety disorder, exists along with MSBP.

Caregivers with MSBP very often resist treatment. Typically, they experience extreme denial about the problem and diagnosis. Also, these caregivers often try to manipulate health professionals involved in their treatment.

Home Treatment

Munchausen syndrome by proxy (MSBP) is a form of child abuse. Adults who suffer from this disorder need to be diagnosed and treated by a doctor as soon as possible.

MSBP behaviour has a high recurrence rate, and close monitoring and continuous counselling are usually needed. Some children who are reunited with the offending caregiver become victims of MSBP again.

MSBP affects an entire family, not just a mother and child. Support from family and friends can help the mother and child during and after treatment.

If you suspect a child is a victim of Munchausen syndrome by proxy, do not confront the suspected caregiver. This may cause the person to leave the area or hurt the child more to convince others that a reported illness really exists. Consider the following options:

  • Keep a diary of the child's symptoms and significant life events, if possible.
  • Talk to a health professional about your concerns.
  • Report your suspicions to the local health unit or child welfare agency. You can make anonymous reports.
  • Report your concerns to local police authorities.

Other Places To Get Help


Canadian Paediatric Society
2305 Saint Laurent Boulevard
Ottawa, ON  K1G 4J8
Phone: (613) 526-9397
Fax: (613) 526-3332
Web Address:

The Canadian Paediatric Society (CPS) promotes quality health care for Canadian children and establishes guidelines for paediatric care. The organization offers educational materials on a variety of topics, including information on immunizations, pregnancy, safety issues, and teen health.

Child Abuse Prevention (BC)
Safe Kids British Columbia
Web Address:

This Web site provides information and resources for reporting and preventing child abuse in British Columbia and across Canada. It includes numerous links to educational material about recognizing, reporting, and preventing child abuse as well as Child Abuse Hotline information for areas throughout Canada.

Child Welfare Information Gateway
Children's Bureau/ACYF
1250 Maryland Avenue SW, Eighth Floor
Washington, DC  20024
Phone: 1-800-394-3366
(703) 385-7565
Web Address:

The Child Welfare Information Gateway is a national resource for people seeking information about how to prevent, identify, and treat child abuse and neglect. The Web site has information about family support services, fostering and adopting a child, and child welfare issues. There are also links for many toll-free crisis hotline numbers.

15757 North 78th Street
Scottsdale, AZ  85260
Phone: 1-800-4-A-CHILD (1-800-422-4453) child abuse hotline
(480) 922-8212
Fax: (480) 922-7061
Web Address:

Childhelp is a nonprofit agency that provides parenting advice, child abuse prevention, and basic information about the normal growth and development of children. Also, Childhelp provides telephone numbers and information about how to report suspected or observed child abuse or neglect. Hotline counselors and referrals are available. The agency also supports abused children through abuse prevention programs, preschool programs (including Head Start), and community outreach. Other services include referrals to residential treatment facilities, child advocacy centers, group homes, and foster care.

Children's Aid Society of Toronto
30 Isabella Street
Toronto, ON  M2P 1N1
Phone: (416) 924-4646
Web Address:

The Children's Aid Society works to prevent child abuse and neglect through community programs and education. The society also provides foster care, crisis intervention, and facilitates adoption of children who are permanent wards of the province. The Web site has information on common symptoms of abuse and neglect, as well as publications on a variety of child-related topics.

KidsHealth for Parents, Children, and Teens
4600 Touchton Road East, Building 200
Suite 500
Jacksonville, FL  32246
Phone: (904) 232-4100
Fax: (904) 232-4125
Web Address:

This Web site is sponsored by Nemours Foundation. It has a wide range of information about children's health, from allergies and diseases to normal growth and development (birth to adolescence). This Web site offers separate areas for kids, teens, and parents, each providing age-appropriate information that the child or parent can understand. You can sign up to get weekly e-mails about your area of interest.

National Clearinghouse on Family Violence
1907D1 Jeanne Mance Building, Tunney's Pasture
Ottawa, ON  K1A 1B4
Phone: (613) 957-2938
Fax: (613) 941-7285
Web Address:

The National Clearinghouse on Family Violence is a division of the Population and Public Health Branch of Health Canada. The clearinghouse is a resource for people seeking information on the prevention, identification, and treatment of family violence.

Safe Kids Canada
180 Dundas Street West
Toronto, ON  M5G 1Z8
Phone: (416) 813-6766
Fax: (416) 813-4986
Web Address:

Safe Kids Canada is a national injury prevention program provided by the Hospital for Sick Children in Toronto. The Web site provides information on keeping children safe and preventing injuries.

Related Information



  1. American Psychiatric Association (2000). Factitious disorder by proxy. In Diagnostic and Statistical Manual of Mental Disorders, 4th ed., text rev., pp. 781–783. Washington, DC: American Psychiatric Association.

Other Works Consulted

  • Johnson CF (2007). Munchausen syndrome by proxy (MSBP) section of Abuse and neglect of children. In RM Kliegman et al., eds., Nelson Textbook of Pediatrics, 18th ed., pp. 182–184. Philadelphia: Saunders Elsevier.
  • McDermott BE (2008). Factitious disorder by proxy section of Factitious disorder and malingering. In RE Hales et al., eds., The American Psychiatric Publishing Textbook of Psychiatry, 5th ed., pp. 649–652. Washington, DC: American Psychiatric Publishing.
  • Wang D, et al. (2005). Factitious disorders. In BJ Sadock et al., eds., Kaplan and Sadock's Comprehensive Textbook of Psychiatry, 8th ed., vol. 1, pp. 1829–1843. Philadelphia: Lippincott Williams and Wilkins.


By Healthwise Staff
Primary Medical Reviewer Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer Michael J. Sexton, MD - Pediatrics
Specialist Medical Reviewer Andrew Swan, MD, CCFP, FCFP - Family Medicine
Last Revised October 12, 2009

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.