Distinguishing Hypoactive Sexual Desire Disorder from Asexuality
Hypoactive sexual desire disorder (HSDD) and asexuality are fundamentally different: HSDD is characterized by distressing low sexual desire that causes marked personal distress or interpersonal difficulty, while asexuality is a sexual orientation characterized by lack of sexual attraction to anyone without associated distress.
Key Distinguishing Features
Presence of Distress
The most critical differentiator is distress. HSDD, by definition, requires "marked distress or interpersonal difficulty" from the lack of sexual desire 1. In contrast, asexual individuals do not experience distress about their lack of sexual attraction—it is simply their orientation 2.
Research directly comparing these populations found that individuals identifying as asexual (scoring >40 on the Asexual Identification Scale) had significantly lower sex-related distress than those with HSDD 2. This is the clearest clinical marker to distinguish the two conditions.
Sexual Desire Patterns
- HSDD: Characterized by a change or loss of previously present sexual desire, with persistent deficiency of sexual fantasies, thoughts, and desire for sexual activity 1, 3
- Asexuality: Characterized by a lifelong absence of sexual attraction to others, which is experienced as a stable identity rather than a dysfunction 2
Behavioral Differences
Asexual individuals have a greater likelihood of never engaging in sexual intercourse, fantasies, or even kissing and petting compared to all other groups, including those with HSDD 2. Those with HSDD typically have a history of sexual activity and desire that has diminished.
Relationship Status and Context
A binary logistic regression identified that relationship status (long-term dating/married), level of sexual desire, sex-related distress, and alexithymia scores were the best predictors distinguishing HSDD from asexuality 2. Asexual individuals are less likely to be in long-term sexual relationships by choice, whereas those with HSDD often experience interpersonal difficulties within existing relationships.
Clinical Assessment Algorithm
When evaluating a patient presenting with low/absent sexual desire:
Assess for distress: Does the lack of sexual desire cause personal distress or relationship problems?
- Yes → Consider HSDD
- No → Consider asexuality as an orientation
Evaluate temporal pattern: Has sexual desire changed over time?
- Yes (acquired) → Strongly suggests HSDD
- No (lifelong) → More consistent with asexuality
Review sexual history: Has the patient ever experienced sexual attraction or engaged in sexual activity?
- Yes, with previous interest → Points toward HSDD
- No, never experienced attraction → Points toward asexuality
Assess psychological symptoms: Screen for depression, anxiety, and relationship satisfaction
- Depression/anxiety present → More common in HSDD 2
- No psychopathology → More consistent with asexuality
Important Clinical Pitfalls
Do not pathologize asexuality. The research clearly demonstrates that asexuality should not be classified as a sexual dysfunction 2. Attempting to "treat" asexuality as HSDD can cause iatrogenic harm and invalidate a person's sexual orientation.
Avoid assuming all low desire is HSDD. The ASCO guidelines emphasize that discussions about sexual function should be "congruent with the patient's literacy level, cultural/religious beliefs, and sexual orientation" 4. This explicitly recognizes that diverse sexual orientations, including asexuality, are not disorders requiring intervention.
Neurobiological Considerations
Recent neuroimaging research shows that while both conditions involve altered brain processing of sexual stimuli, the patterns differ. Asexual women show distinct neural signatures that can be identified through pattern recognition methods with 71% accuracy 5, suggesting fundamental neurobiological differences rather than asexuality being an "extreme variant" of HSDD.
Treatment Implications
For HSDD: Multiple interventions are appropriate, including psychosexual counseling, couples therapy, and pharmacotherapy (flibanserin for premenopausal women, testosterone for postmenopausal women) 4, 6, 7
For asexuality: No treatment is indicated. Instead, provide education, validation, and support for the patient's sexual orientation. If the patient is distressed about being asexual (rather than distressed by lack of desire itself), psychological support may help with acceptance and identity integration.