What Drives HS

HS Has Internal Causes — Not Just External Triggers

Hidradenitis Suppurativa is not caused by poor hygiene, friction, or bad luck. It is driven by a combination of internal systemic imbalances — in the gut, hormonal system, immune response, and metabolism. This page maps the key drivers and explains how they interact to sustain the condition.

The Root Cause Question

Why It Keeps Coming Back Is the Right Question

Most patients with HS have already identified their external triggers — heat, friction, certain foods, stress episodes. But triggers are not causes. A trigger is something that activates an already-primed internal environment. Remove the trigger and the environment remains. This is why HS recurs even when patients carefully avoid everything that seems to make it worse.

The goal of understanding HS causes is not to produce a list of things to avoid. It is to identify what is sustaining the internal conditions in which HS operates — so that those conditions can be systematically corrected.

"If it keeps coming back, it means the root cause has not been addressed."

The five primary internal drivers documented below are not independent. They interact — each amplifying the others. This is why HS that has been active for several years requires a multi-system approach, not single-factor correction.

Primary Internal Drivers

The Five Systems That Sustain HS

Each of these operates as a root driver — not a trigger. Correcting them, not just managing their effects, is what changes the disease trajectory.

Driver 01 Gut Dysfunction Impaired digestion and gut permeability allow inflammatory compounds to enter systemic circulation, sustaining the immune dysregulation that drives HS. Gut dysfunction does not cause isolated skin lesions — it maintains the systemic inflammatory environment in which HS operates continuously. Explore gut health in HS → Driver 02 Hormonal Imbalance Androgen excess, PCOS, and disrupted oestrogen-progesterone balance directly stimulate follicular activity in HS-prone regions. Hormonal HS is characterised by flares that follow predictable hormonal cycles — around menstruation, after hormonal changes, or in parallel with PCOS activity. Explore hormonal drivers in HS → Driver 03 Insulin Resistance Insulin resistance amplifies androgen activity, fuels systemic inflammation, and creates the metabolic environment in which HS persists and worsens. The strong overlap between HS, obesity, and metabolic syndrome is not coincidental — insulin dysregulation is a shared mechanism across all three. Explore insulin resistance in HS → Driver 04 Chronic Stress Chronic stress dysregulates the HPA axis, elevates cortisol, and suppresses immune calibration — creating conditions in which inflammatory responses become disproportionate. Stress does not merely trigger HS flares; it sustains the hormonal and immune environment that makes them inevitable. Explore stress as a driver in HS → Driver 05 Diet and Metabolic Load Dietary patterns that sustain gut inflammation, raise glycaemic load, and amplify androgen activity directly worsen HS severity and frequency. Diet is a modifiable driver — targeted dietary correction is one of the most accessible levers for reducing inflammatory burden and improving treatment response. Explore diet as a driver in HS →
The Interaction These Drivers Amplify Each Other Gut dysfunction worsens insulin sensitivity. Insulin resistance amplifies androgen excess. Hormonal imbalance aggravates gut permeability. Chronic stress disrupts all three. No single driver operates in isolation in established HS — which is why single-factor treatment consistently produces temporary results.
Why Surface Treatment Fails

The Internal Cause Is Why the External Symptom Returns

HS is not a skin disease that happens to have internal correlates. It is a systemic disease that expresses through the skin. The lesion is the end-stage output of a process that has been operating internally — in the gut, endocrine system, immune network, and metabolism — for months or years before the first visible nodule appears.

This is why antibiotic courses reduce acute lesion activity but do not stop recurrence. The antibiotic addresses the bacterial environment of the lesion. It does not address the hormonal, metabolic, or immune environment that produced the follicular occlusion and inflammatory cascade in the first place.

The goal is not just to control symptoms, but to understand why the condition is occurring in the first place — and to correct the internal environment systematically.

How the Drivers Connect — A Typical Chain

01 →
Gut dysfunction accumulates inflammatory load Impaired digestion allows toxin absorption, triggering sustained low-grade systemic inflammation.
02 →
Inflammation amplifies insulin resistance Systemic inflammatory cytokines impair insulin signalling, worsening metabolic function.
03 →
Insulin resistance elevates androgen activity Elevated insulin stimulates ovarian and adrenal androgen production, increasing follicular stimulation.
04 →
Androgen excess drives follicular occlusion Increased sebum production and follicular keratinisation create the structural conditions for HS lesion formation.
05 →
Stress amplifies every step Cortisol dysregulation worsens gut permeability, insulin resistance, and immune calibration simultaneously.
→
Result: the lesion appears — and recurs The skin lesion is the output. The chain above is the cause. Treating the lesion alone leaves the chain intact.
Next Step

Identifying Your Specific Drivers Is Where Correction Begins

Not every patient has the same combination of active drivers. A structured evaluation identifies which internal systems are most active in your case — and what a personalised correction approach looks like for your specific presentation, stage, and history.

Begin Evaluation ← Understanding HS