Sex, Intimacy and Chronic Illness: The Conversation Nobody Starts

You will find twelve articles about explaining your illness to your boss before you find one about this. And yet it comes up constantly in private — quietly, usually with an apology attached, as though wanting a normal intimate life while chronically ill were a slightly greedy request.

It isn't a moral failing, and it usually isn't a relationship problem either. There are physical mechanisms behind it, they're documented, and knowing which one applies to you is the difference between a conversation with your partner and a conversation with your doctor.

📊 What the research actually found

For years there was almost nothing to point to. That has changed. A 2025 community-based study published in Rheumatology Advances in Practice assessed sexual function in 84 women with hypermobile Ehlers-Danlos syndrome or hypermobility spectrum disorders, using the Female Sexual Function Index alongside a validated autonomic symptom score.

The findings are worth stating plainly. A majority — 52% — reported no sexual activity at all. Fifty-eight percent of the group also had POTS, and a quarter had the full trifecta of POTS, hypermobility and MCAS. Compared with women with POTS from the same researchers' earlier case-control study, the hEDS and HSD group reported greater difficulty across every domain measured, despite a comparable autonomic symptom burden.

That last detail is the interesting one. It suggests connective tissue is contributing something of its own, on top of the autonomic picture — not simply that sicker people have less sex.

🫀 The four mechanisms worth knowing

These overlap, and most people have more than one running at once.

• Orthostatic intolerance. Blood pressure, heart rate and blood pooling don't respond to exertion or position change the way they should. Presyncope, tachycardia and that grey wrung-out feeling afterwards are the same mechanism you already know from showers and queues, in a different setting.

• Joint instability. Hips, shoulders, knees and jaw are the joints that most often complain. This is the mechanism that responds best to practical adaptation, and the one people are least likely to mention.

• Pain, including pelvic pain. Dyspareunia and probable vulvodynia are documented at high rates in the Ehlers-Danlos syndromes and hypermobility spectrum disorders. This is a medical finding with medical answers, not something to endure quietly.

• Mast cell activation. Flushing, itching, hives or a reaction afterwards can follow physical exertion, heat, or contact with products. If your reactions are unpredictable elsewhere, they will be here too.

Add fatigue and post-exertional malaise underneath all four, and you get the pattern most people actually live with: not an absence of desire, but a cost calculation that keeps coming out badly.

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💬 Why nobody raises it

Two silences stack on top of each other. Patients don't bring it up because it feels frivolous next to a tilt-table test, and because they assume they'll be told it's stress. Clinicians don't bring it up because it isn't on the form and the appointment is eleven minutes long.

The result is that a symptom with real physical causes gets filed under relationship difficulty, where it is nobody's job to treat it. Emerging work in sexual medicine has started naming POTS, hEDS and MCAS as overlooked systemic contributors to sexual dysfunction — which is a polite way of saying the field has been looking in the wrong place.

If you take one thing from this article, make it this: it is a legitimate thing to put on the list you bring to your appointment.

🩺 Who to actually raise it with

The specialist depends on which mechanism is loudest, and matching them properly saves months.

• Pelvic pain, or pain with penetration → a gynaecologist, ideally one who has seen vulvodynia before. A pelvic health physiotherapist is often the more useful second referral.

• Joint pain, instability or subluxation → a physiotherapist who understands hypermobility. Joint protection principles are joint protection principles; they apply here exactly as they do to anything else.

• Presyncope, racing heart, feeling wrung out afterwards → whoever manages your POTS. This is orthostatic intolerance in a new context, and it responds to the same levers.

• Flushing, hives or reactions → your allergist or immunologist, along with the product list you already keep.

• Low desire with no clear physical driver → worth a proper look rather than an assumption. Fatigue, depression, pain and several common medications all affect libido, and medication is the one people forget to ask about.

❤️ The conversation at home

The practical piece is smaller than it feels: plan around your pattern rather than fighting it, treat energy as the constraint it actually is, and let a bad day be a bad day rather than evidence about the relationship.

What tends to do the real damage is silence, not limitation. A partner who isn't told about the mechanism fills the gap with the worst available explanation — that you've lost interest in them. Naming the specific thing ("standing makes me faint, so does this") is less exposing than it sounds, and considerably less exposing than the alternative.

Common questions

Sources

• Fuster E, Mirmosayyeb O, Blitshteyn S. Sexual dysfunction in women with hypermobile Ehlers–Danlos syndrome and hypermobility spectrum disorders: an online community-based study. Rheumatology Advances in Practice, 2025.

• Blitshteyn S, et al. Sexual Dysfunction in Postural Orthostatic Tachycardia Syndrome (POTS): A Cross-Sectional, Case-Control Study. Journal of Clinical Medicine, 2024.

• The Ehlers-Danlos Society — What is HSD?

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⚕️ This article is general information, not medical advice, diagnosis or treatment. Pain, new symptoms or anything that worries you should be assessed by a healthcare professional who knows your history.