Understanding the Genetic Links in Hair Pulling and Skin Picking Disorders in Families
This genomic study explored the genetic roots of hair pulling (trichotillomania) and skin picking (excoriation disorder) in families, finding connections to genes involved in obsessive-compulsive disorder.
Research Profile
Published: June 19, 2026
Added to SpecialCircle: June 19, 2026
Evidence Level
Early researchResearch Status
Early-stage researchKey takeaways
- •Hair pulling (trichotillomania) and skin picking (excoriation disorder) are often grouped as body-focused repetitive behaviors (BFRBs).
- •This study looked at genetic factors in families affected by these conditions, including both parents and children.
- •It found that certain common genetic variations associated with obsessive-compulsive disorder (OCD) might also contribute to the risk for BFRBs.
- •Researchers identified some rare genetic changes in individuals with BFRBs, specifically in genes important for brain development and connections between brain cells.
Source
Translational psychiatry · Peer-reviewed study
Read the original sourcePlain-language summary
This research looked into the genetic factors behind two conditions called trichotillomania (hair pulling) and excoriation disorder (skin picking), which are known as body-focused repetitive behaviors (BFRBs). Researchers studied families, including parents and children, to see if there were shared genetic links.
They found that certain common genetic variations associated with obsessive-compulsive disorder (OCD) might also increase the risk for BFRBs. They also identified some rare genetic changes that affect genes important for brain development and how brain cells connect.
This study helps us better understand the genetic basis of these conditions and opens the door for more extensive genetic research in the future.
How it works
Science explained
The study found that common genetic variations linked to obsessive-compulsive disorder (OCD) may play a role in the risk for body-focused repetitive behaviors (BFRBs). It also identified rare genetic changes (called copy-number variants) in genes that are sensitive to mutations. These specific genes are involved in how brain cells organize themselves and in the overall development of the nervous system. This suggests that differences in these genes could influence brain pathways related to these behaviors.
Why parents may care
For parents whose children struggle with body-focused repetitive behaviors like hair pulling or skin picking, this study offers new insights into the potential genetic causes. Understanding that these conditions might have genetic links, especially with obsessive-compulsive disorder, can help families feel less alone and potentially guide future approaches to understanding and supporting their child.
What this means for daily life
This research is foundational and doesn't offer immediate changes for daily life. However, a deeper understanding of the genetic underpinnings of these conditions could eventually lead to more personalized strategies for managing them.
What is still unknown
The genetic architecture of body-focused repetitive behaviors (BFRBs) is still "incompletely understood." This study is an early step, and more extensive genomic studies are needed to fully uncover the genetic factors involved.
The specific ways these genetic variations lead to the behaviors are also still being explored.
Frequently asked questions about Anxiety Disorders
Trichotillomania (hair pulling) and excoriation disorder (skin picking) are conditions where a person repeatedly pulls out their hair or picks at their skin. They are grouped together as body-focused repetitive behaviors (BFRBs) and are related to obsessive-compulsive disorders.
Terminology glossary
- Trichotillomania
- A condition characterized by the repeated urge to pull out one's own hair.
- Excoriation disorder
- A condition characterized by repetitive and compulsive picking of one's own skin, resulting in skin lesions.
- Body-focused repetitive behaviors (BFRBs)
- A group of behaviors that involve repetitive self-grooming actions that result in physical damage to the body.
- Genomic study
- A type of research that investigates the entire set of genes (genome) of an organism to understand genetic influences on traits or diseases.
- Polygenic scores
- A way to estimate an individual's genetic predisposition to a trait or disease based on many common genetic variations across their genome.
- Copy-number variants (CNVs)
- Sections of DNA that are repeated or deleted, leading to an abnormal number of copies of certain genes.
- Obsessive-compulsive disorder (OCD)
- A mental health condition characterized by unwanted, intrusive thoughts and repetitive behaviors performed in response to those thoughts.
Questions to ask your doctor or therapist
- ?Are there genetic factors that might be contributing to my child's body-focused repetitive behaviors?
- ?What resources are available for families dealing with conditions like trichotillomania or excoriation disorder?
- ?How do obsessive-compulsive related disorders connect to other mental health conditions?
⚕️ This research digest is for educational and community support purposes only. It is not medical advice, diagnosis, or treatment. Always speak with a qualified doctor, therapist, or medical professional before making decisions about care.
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