Introduction

Persistent Genital Arousal Disorder (PGAD) is a recently described sexual disorder, a rare condition involving unwanted genital arousal without desire affecting both women and men. Studies have shown that 1-4% of the population may be affected. Originally coined ‘Persistent sexual arousal syndrome (PSAS)’, the word ‘genital’ replaced ‘sexual’ as sexual implies feelings of desire, which is not applicable to PGAD.

In this article, we’ll explore the complex relationship between crucial hormones such as estrogen, dopamine, serotonin and PGAD. Whether you’re someone experiencing PGAD symptoms or simply curious about this rare condition, we’ll be shedding light on this complex disorder.

Symptoms of PGAD

PGAD is a distressing condition where individuals experience persistent, unwanted genital arousal that

• Occurs without sexual stimulation or thoughts
• Doesn’t resolve with an orgasm
• Can cause significant psychological distress
• Can last for hours, days or longer periods

 PGAD symptoms

• Pain or discomfort in your genitals
•  Tingling in your clitoris
• Vaginal contractions
• Vaginals lubrication
• Unpredictable orgasms

You may also experience orgasms that fail to relieve your symptoms.

Persistent genital arousal disorder and the role of hormones

PGAD remains under-researched, leaving many sufferers without a proper diagnosis or treatment. Recent studies have shown that up to 1% of women may experience PGAD symptoms, though the numbers may be higher due to a misunderstanding of the disorder.

The medial preoptic area (MPOA) of the hypothalamus is central to sexual response. Recent emerging studies have shown that the corresponding hormones have possible links to PGAD. Hormonal imbalances, particularly involving estrogen, dopamine and serotonin, have been identified as possible contributors.

Estrogen

Estrogen is a necessary sex hormone found in males and females; however, it is more commonly associated with females, responsible for maintaining sexual and reproductive health. An imbalance of this hormone and the result of that has links to how PGAD presents itself. We know Estrogen is more commonly associated with women and their hormonal cycles, and since PGAD is more prevalent in women, this is thought to influence how PGAD operates.

Excess estrogen is also linked to increased sex drive, while a decrease causes a reduction in sex drive. This is one of the reasons that an imbalance of Estrogen is thought to have a link to PGAD.

• High estrogen states may increase genital sensitivity
• Low estrogen states can cause nerve hypersensitivity

Dopamine

Dopamine is a complex hormone and neurotransmitter affecting emotions, behaviour and movement. It plays a role in various functions, including pleasure and satisfaction. However, dopamine’s role in the body extends further than just simple pleasure.

There are 2 main dopamine pathways involved in sexual arousal:

• The Mesolimbic Pathway: Reward processing
• The Nigrostrial Pathway: Movement control

Dopamine in the nigrostriatal tract influences motor activity; it controls genital reflexes, copulatory patterns, and specifically sexual motivation.

Therefore, excess dopamine or an imbalance of dopamine activity may create a constant state of sexual arousal. The exact involvement of dopamine in sexual motivation and in the control of genital arousal in humans is unknown. However, experimental data do suggest an implication of dopamine at all these stages.

Parkinson’s disease is also affects by the Nigrostriatal pathway, which is key in movement. In Parkinson’s, the pathway degenerates as a result of the levels of dopamine decreasing. Parkinson's patients have sometimes reported PGAD symptoms, further proving the link between hormonal imbalances and PGAD.  In restless leg syndrome, dopamine also plays a role. Dopamine is involved in controlling muscle movement and can be responsible for involuntary movement.  When nerve cells become damaged, this has an effect on the level of dopamine in the brain, reducing it. This causes muscle spasms and involuntary movements. Dopamine levels also naturally fall towards the end of the day, which can also explain why the symptoms of restless leg syndrome are worse in the evening and during the night. Dopamine’s result in restless leg syndrome also suggests a similar mechanism affecting the genital nerves.

Serotonin

Serotonin plays a complex role in sexual function and, consequently, PGAD. It normally acts as an inhibitory neurotransmitter for sexual responses, helping filter out inappropriate arousal signals as well as maintaining a baseline state of non-arousal when sexual stimulation is absent. In PGAD, it seems this system does not function correctly.

Selective serotonin reuptake inhibitors (SSRIs) and serotonin-norepinephrine reuptake inhibitors (SNRI) are the most likely antidepressants to cause sexual side effects. Yet, paradoxically, SSRIs are also used to help PGAD patients. This suggests that their function is altered when it comes to patients with PGAD. So, while low serotonin generally increases sexual desire, in PGAD, it appears to create a pathological state of unregulated arousal.

Interaction with other hormones

These 3 hormones interact daily and all play a crucial role in modulating sexual arousal and desire.

• Serotonin balances dopamine’s excitatory effects
• Serotonin coordinates with estrogen’s influences on genital tissues
• Estrogen boosts serotonin production
• Estrogen enhances dopamine synthesis and receptor sensitivity in areas in the brain linked to sexual motivation
• Estrogen enhances dopamine receptor sensitivity 

Treatment

There is no standardised treatment algorithm for PGAD due to a lack of clinical trials. However, while there is no specific treatment or medicine to take for PGAD, proposed methods of treatment include psychotherapy, electroconvulsive therapy, hypnotherapy, pelvic floor physical therapy, application of anesthetising agents, and reduction of identifiable.

Emerging research focuses on

• Personalised hormone protocols based on genetic testing
• Non-hormonal neuromodulators that recalibrate arousal pathways
• Advanced nerve-blocking techniques
• Digital therapeutics that help patients track and manage symptoms

Due to the specificity of symptoms, patients may feel shame and discomfort, which can lead to a delay in reporting symptoms to a doctor. It is crucial to spread knowledge about this disorder, which would allow doctors to diagnose and help PGAD patients sooner.

Conclusion

The recognition of PGAD as a hormonally mediated condition represents a shift in the attitude towards it. For sufferers of PGAD, it means moving in the right direction for treatment and relief. Instead of dismissal and guesswork, validation and targeted treatment will become the norm. While much remains unknown, the growing understanding of estrogen, dopamine and serotonin, the interactions between them, offers hope for further solutions. 

Key takeaways

Dopamine: Dopamine can enhance sexual motivation, lower sexual inhibition thresholds and can also create “stuck” arousal states. 

Different medical conditions have shown us connections between PGAD and dopamine, with dopamine agonists (Parkinson's meds) triggering PGAD-like symptoms, dopamine antagonists sometimes providing relief and a connection to other dopamine-related conditions like restless leg syndrome.

• Plays a key role in sexual motivation and arousal
• Helps regulate the brain’s pleasure centre
• Imbalances may lead to hypersensitive sexual responses.
• Dopamine has facilitative effects on genital reflexes.

Estrogen

• Regulates genital blood flow and sensitivity
• Maintains healthy vaginal and clitoral tissues
• Fluctuates significantly during menstrual cycles, pregnancy and menopause

Serotonin

•  Helps inhibit inappropriate sexual responses
• Low levels associated with increased sexual thoughts/behaviours
• SSRIs (which increase serotonin) sometimes help manage PGAD

Optimal sexual function requires precise ratios, so any kind of imbalance in systems can disrupt the whole system.

FAQs

Why are women more likely to develop PGAD?

Women experience more hormonal fluctuations due to:

• Menstrual cycles
• Pregnancy and postpartum changes
• Perimenopause and menopause
• Hormonal birth control

Estrogen’s interaction with dopamine and serotonin makes women more vulnerable to PGAD when these systems are disrupted.

How is PGAD diagnosed?

There’s no single test, but doctors may:

1. Rule out infections, nerve damage, or other conditions
2. Check hormone levels (estrogen, progesterone, prolactin, thyroid)
3. Review medications and health history
4. Use questionnaires to assess symptoms

A specialist (urologist, gynaecologist, or sexual medicine expert) is often needed for proper diagnosis.

Can men get PGAD?

Yes, but it’s less common. In men, PGAD may be linked to:

• Prostate issues
• Nerve damage (e.g., from diabetes or surgery)
• Dopamine-affecting medications

Treatment focuses on addressing underlying causes (like adjusting medications or hormone therapy).

Is PGAD permanent?

For many, PGAD is manageable but chronic. Some find complete relief with:

• Correcting hormonal imbalances
• Changing medications
• Neuromodulator therapy

Early intervention improves outcomes, so seek help if symptoms persist.

When should I see a doctor?

Consult a specialist if you have:

• Persistent, unexplained genital arousal
• Symptoms lasting weeks/months
• Distress affecting daily life
• No relief from typical UTI/yeast infection treatments