"Trichotillomania: 150 Essential Questions & Evidence-
Based Answers with Rationales (2025 Edition)"
**Q1. What is the formal DSM-5-TR name for trichotillomania?**
**Answer:** Trichotillomania (Hair-Pulling Disorder) .
**Rationale:** The DSM-5 moved the disorder from "Impulse-Control Disorders Not Elsewhere
Classified" to "Obsessive-Compulsive and Related Disorders" and added the parenthetical
specifier .
**Q2. What is the primary behavioral characteristic of trichotillomania?**
**Answer:** Recurrent pulling out of one's own hair, resulting in noticeable hair loss .
**Rationale:** This is Criterion A in the DSM-5-TR. The pulling is not done for cosmetic reasons
.
**Q3. According to DSM-5-TR, what is Criterion B for trichotillomania?**
**Answer:** Repeated attempts to decrease or stop hair pulling .
**Rationale:** This criterion demonstrates that the behavior is unwanted and the individual is
struggling to control it .
**Q4. How has the DSM-5 changed the sensory criterion (tension/relief) for trichotillomania?**
**Answer:** The DSM-5 *dropped* the requirement of an increasing sense of tension before
pulling or pleasure/gratification/relief when pulling .
**Rationale:** Research showed that not all individuals experience these sensory phenomena,
so removing it as a requirement improved diagnostic accuracy .
**Q5. What is the DSM-5-TR Criterion C regarding distress?**
**Answer:** The hair pulling causes clinically significant distress or impairment in social,
occupational, or other important areas of functioning .
,**Rationale:** This ensures the behavior is not just a harmless habit but a disorder with
functional impact .
**Q6. What does DSM-5-TR Criterion D state about medical conditions?**
**Answer:** The hair pulling or hair loss cannot be attributed to another medical condition
(e.g., a dermatological condition) .
**Rationale:** This requires ruling out conditions like alopecia areata or tinea capitis .
**Q7. What does DSM-5-TR Criterion E state about other mental disorders?**
**Answer:** The hair pulling cannot be better explained by the symptoms of another mental
disorder (e.g., attempts to improve a perceived defect or flaw in appearance, as in body
dysmorphic disorder) .
**Rationale:** This differentiates trichotillomania from body dysmorphic disorder, where hair
removal is cosmetic .
**Q8. Which chapter of the DSM-5-TR contains trichotillomania?**
**Answer:** Obsessive-Compulsive and Related Disorders .
**Rationale:** It is grouped with OCD, body dysmorphic disorder, hoarding disorder, and
excoriation disorder .
**Q9. What was the diagnostic classification of trichotillomania in DSM-IV?**
**Answer:** Impulse-Control Disorders Not Elsewhere Classified .
**Rationale:** The reclassification reflects evidence of shared heritability and brain function
abnormalities with OCD .
**Q10. Is a biopsy required to diagnose trichotillomania?**
**Answer:** No, diagnosis is usually based on clinical findings and asking the patient about
hair-pulling .
, **Rationale:** Biopsy is reserved for when the diagnosis is unclear and other dermatological
conditions must be ruled out .
**Q11. What histological findings might be seen on a biopsy of a trichotillomania lesion?**
**Answer:** Empty hair follicles, hemorrhage, misshapen hair shaft fragments (pigment casts),
and increased catagen follicles .
**Rationale:** These findings reflect mechanical trauma to the hair follicles .
**Q12. What histological finding characterizes alopecia areata, a key differential diagnosis?**
**Answer:** Peribulbar lymphocytic infiltrate (often described as "swarm of bees") .
**Rationale:** This distinguishes it from the traumatic changes seen in trichotillomania .
**Q13. What is the typical age of onset for trichotillomania?**
**Answer:** Typically just before or after puberty, with the most common onset in childhood
or adolescence (often ages 10-13) .
**Rationale:** This aligns with the developmental period where stressors and identity
formation occur .
**Q14. What is the estimated lifetime prevalence of trichotillomania?**
**Answer:** Approximately 0.6% to 2.2% .
**Rationale:** It is considered an uncommon but not rare disorder .
**Q15. What is the gender distribution of trichotillomania in adults?**
**Answer:** In clinical samples, approximately 80-90% of adults with trichotillomania are
female, although community prevalence may be more balanced .
**Rationale:** There is a slight female predominance, particularly in adult clinical populations .
Based Answers with Rationales (2025 Edition)"
**Q1. What is the formal DSM-5-TR name for trichotillomania?**
**Answer:** Trichotillomania (Hair-Pulling Disorder) .
**Rationale:** The DSM-5 moved the disorder from "Impulse-Control Disorders Not Elsewhere
Classified" to "Obsessive-Compulsive and Related Disorders" and added the parenthetical
specifier .
**Q2. What is the primary behavioral characteristic of trichotillomania?**
**Answer:** Recurrent pulling out of one's own hair, resulting in noticeable hair loss .
**Rationale:** This is Criterion A in the DSM-5-TR. The pulling is not done for cosmetic reasons
.
**Q3. According to DSM-5-TR, what is Criterion B for trichotillomania?**
**Answer:** Repeated attempts to decrease or stop hair pulling .
**Rationale:** This criterion demonstrates that the behavior is unwanted and the individual is
struggling to control it .
**Q4. How has the DSM-5 changed the sensory criterion (tension/relief) for trichotillomania?**
**Answer:** The DSM-5 *dropped* the requirement of an increasing sense of tension before
pulling or pleasure/gratification/relief when pulling .
**Rationale:** Research showed that not all individuals experience these sensory phenomena,
so removing it as a requirement improved diagnostic accuracy .
**Q5. What is the DSM-5-TR Criterion C regarding distress?**
**Answer:** The hair pulling causes clinically significant distress or impairment in social,
occupational, or other important areas of functioning .
,**Rationale:** This ensures the behavior is not just a harmless habit but a disorder with
functional impact .
**Q6. What does DSM-5-TR Criterion D state about medical conditions?**
**Answer:** The hair pulling or hair loss cannot be attributed to another medical condition
(e.g., a dermatological condition) .
**Rationale:** This requires ruling out conditions like alopecia areata or tinea capitis .
**Q7. What does DSM-5-TR Criterion E state about other mental disorders?**
**Answer:** The hair pulling cannot be better explained by the symptoms of another mental
disorder (e.g., attempts to improve a perceived defect or flaw in appearance, as in body
dysmorphic disorder) .
**Rationale:** This differentiates trichotillomania from body dysmorphic disorder, where hair
removal is cosmetic .
**Q8. Which chapter of the DSM-5-TR contains trichotillomania?**
**Answer:** Obsessive-Compulsive and Related Disorders .
**Rationale:** It is grouped with OCD, body dysmorphic disorder, hoarding disorder, and
excoriation disorder .
**Q9. What was the diagnostic classification of trichotillomania in DSM-IV?**
**Answer:** Impulse-Control Disorders Not Elsewhere Classified .
**Rationale:** The reclassification reflects evidence of shared heritability and brain function
abnormalities with OCD .
**Q10. Is a biopsy required to diagnose trichotillomania?**
**Answer:** No, diagnosis is usually based on clinical findings and asking the patient about
hair-pulling .
, **Rationale:** Biopsy is reserved for when the diagnosis is unclear and other dermatological
conditions must be ruled out .
**Q11. What histological findings might be seen on a biopsy of a trichotillomania lesion?**
**Answer:** Empty hair follicles, hemorrhage, misshapen hair shaft fragments (pigment casts),
and increased catagen follicles .
**Rationale:** These findings reflect mechanical trauma to the hair follicles .
**Q12. What histological finding characterizes alopecia areata, a key differential diagnosis?**
**Answer:** Peribulbar lymphocytic infiltrate (often described as "swarm of bees") .
**Rationale:** This distinguishes it from the traumatic changes seen in trichotillomania .
**Q13. What is the typical age of onset for trichotillomania?**
**Answer:** Typically just before or after puberty, with the most common onset in childhood
or adolescence (often ages 10-13) .
**Rationale:** This aligns with the developmental period where stressors and identity
formation occur .
**Q14. What is the estimated lifetime prevalence of trichotillomania?**
**Answer:** Approximately 0.6% to 2.2% .
**Rationale:** It is considered an uncommon but not rare disorder .
**Q15. What is the gender distribution of trichotillomania in adults?**
**Answer:** In clinical samples, approximately 80-90% of adults with trichotillomania are
female, although community prevalence may be more balanced .
**Rationale:** There is a slight female predominance, particularly in adult clinical populations .
