What causes obsessive compulsive disorder (OCD)?

The exact cause of OCD is not well known. Some theories as to what causes obsessive compulsive disorder include:
  • Biology: It is thought that changes in body chemistry or brain functions may be responsible for OCD. The brain may not respond normally to the chemical, serotonin. 
  • Genetics may play a role in the development of OCD. The specific genes are not yet known. If you have a parent or sibling with OCD, there’s almost a 25% chance another immediate family member will have it. 
  • Environment: More research is needed on this theory, but environmental factors such as certain infections may play a role in developing OCD. 
obsessive compulsive disorder (OCD) causes

  • "Obsessive-compulsive disorder (OCD)." Mayo Clinic. Mayo Foundation for Medical Education and Research, 17 Sep. 2016. Web. 16 Nov. 2017.
  • “Obsessive-Compulsive Disorder.” National Alliance on Mental Illness. NAMI, n.d. Web. 16 Nov. 2017. 



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