The point the disease changes character
For a while it was lumps. Each one came up, hurt, drained or settled, and went. Then something changed. Two old sites joined. You pressed near one scar and something discharged from another, an inch away. There is now an opening that never fully closes, that weeps onto a dressing you change without thinking about it, and that has been there — not flaring, just there — for months.
That is the transition. HS has stopped being an inflammatory event and become a structure. This is the most important shift in the whole disease, and it changes what treatment can honestly promise you.
What a tunnel actually is
Repeated follicular rupture drives inflammation into the deeper tissue. The body, unable to resolve it, walls it off — and in doing so it lines a channel with epithelium. That channel is a sinus tract. Once epithelialised, it is not swelling. It is a permanent-ish anatomical passage: it holds debris and bacteria, it connects lesion sites, it discharges, and it keeps a low-grade inflammatory conversation running under skin that looks quiet from the outside.
This is why a tunnel does not behave like a nodule. A nodule is inflammation and will respond to lowering inflammation. A tunnel is architecture, and lowering inflammation does not un-build it.
Why tunnels form in some people and not others
The same drivers that started the disease decide how far it goes: gut dysbiosis, immune dysregulation, hormonal signalling, insulin resistance. HS is a systemic condition expressing through the skin, and tunnelling is what happens when that systemic drive runs unopposed for long enough at a site under constant friction and occlusion.
Time is the other factor, and it is the one most people lose to misdiagnosis. Years of being told these are boils, cysts, ingrown hairs, abscesses or a hygiene problem are years in which follicles keep rupturing and the architecture keeps being laid down. Almost every tunnelled patient we see spent that time being treated for something they did not have.
Why previous treatments did not hold
Structural, and not a criticism of anyone. Antibiotics reduce bacterial load in a tract but disrupt the microbiome, which is itself one of the drivers. Steroids and biologics suppress the immune signalling without correcting why it misfires — and a suppressed signal does not dismantle an existing tract. Surgery removes the tract but not the internal environment that built it, which is why new tunnels so often appear at the edge of the excision. Each treatment did what it was designed to do. None of them was designed to change the terrain.
What root-cause correction can and cannot do here
Be clear about the two halves.
What it can do: stop the production line. Phase L, Inflammatory Load Reduction (oral), takes down the inflammatory pressure that drives the ruptures feeding new tracts. Phase I, Internal Correction (oral), works on the gut and immune drivers underneath. Phase F, Functional Clearance (oral), clears accumulated load — and it comes only after L and I are stable, because in tunnelled disease more than anywhere else, mobilising load faster than the system can clear it will light up every tract you have. The sequence is not negotiable. Phase E, External Tissue Repair, is a topical used at home on discharging openings and scarred skin. Phase S, Remission Maintenance, is a tapered oral phase across six to twelve months.
What that produces, realistically: fewer new lesions, less discharge from existing openings, tracts that quieten and often shrink, less pain, and — the outcome that matters most — no new tunnels being built.
What it cannot reliably do: fully close a mature, epithelialised tunnel, or return scarred skin to normal skin. Some tracts do close. Many soften, dry and quieten without closing completely. Extensive tunnelled disease — EPOH-DSS Stage 4, advanced tunneling, Hurley III — may not achieve full remission at all. There is no cure on offer here and you should be suspicious of anyone who uses the word. What is on offer is sustained remission of the active disease and an end to the process that keeps building.
Where surgery still fits
If you have a large, fixed, symptomatic tract, a surgeon may still be the right person to remove it — and root-cause correction is what changes the environment so that what is removed does not simply rebuild beside the scar. These are not competing options. The mistake is doing the second without the first.
Staging
EPOH-DSS Stage 3 is sinus formation; EPOH-DSS Stage 4 is advanced tunneling. These map onto Hurley II and III. Your treatment response is tracked separately, as Recovery Stages — Recovery Stage 1 internal shift, Recovery Stage 2 reduced frequency, Recovery Stage 3 reduced severity, Recovery Stage 4 stable remission. In tunnelled disease, progress is usually read in discharge, pain and new-lesion formation long before it is read in the tunnels themselves.
Your next step
Consultation is by video or WhatsApp; there is no procedure and no clinic visit at any stage, and your formulations are couriered to you. Send photographs, your history and any operation notes you have. You will be told which of your lesions are inflammatory and which are structural, and what each of them can honestly be expected to do.
