CO2 Laser Treatment for Hidradenitis Suppurativa: Can It Help?

Hidradenitis suppurativa (HS) is the kind of skin condition that doesn’t just “show up”it moves in, redecorates,
and then invites its friends. Painful lumps, recurring flare-ups, tunnels under the skin, scarring, draining (ugh),
and a quality-of-life hit that can feel wildly unfair.

If you’ve ever thought, “There has to be something more targeted than yet another round of antibiotics or a
temporary drainage,” you’re not alone. One option that comes up more and more in HS conversations is the
carbon dioxide (CO2) laser.

So… can CO2 laser treatment actually help hidradenitis suppurativa? For the right person, with the right type of HS,
done by the right clinician, it can be a genuinely useful toolespecially for stubborn tunnels and recurring lesions
in specific areas. But it’s not a magic wand, and it comes with trade-offs like healing time, wound care, and cost.

Let’s break it all down in plain Englishwith a little humorso you can walk into a dermatology appointment feeling
informed, not overwhelmed.

First, a quick HS refresher (because context matters)

HS is a chronic inflammatory skin disease that tends to affect areas where skin rubs togetherthink
armpits, groin, buttocks, inner thighs, and under the breasts. It’s strongly linked to inflammation around hair
follicles, which can lead to painful nodules, abscesses, andmost importantly for this articletunnels
(also called sinus tracts) under the skin.

Those tunnels are a big reason HS can be so persistent. Once a tunnel forms, it often doesn’t just politely pack up
and leave. It can keep flaring, draining, scarring, and re-inflaming the same neighborhood.

Clinicians often describe HS severity using the Hurley staging system:

• Hurley Stage I: isolated nodules/abscesses, no tunnels, minimal scarring
• Hurley Stage II: recurrent lesions with tunnels and scarring, more than one area may be involved
• Hurley Stage III: widespread disease with interconnected tunnels and extensive scarring

Where you fall on that spectrumand what your lesions look likehelps determine whether a CO2 laser approach is a
sensible option.

Where CO2 laser fits in the HS treatment toolbox

HS treatment is usually a combo strategy. Medications can reduce inflammation and help prevent new
lesions. Procedures and surgery are often used to manage established tunnels and stubborn, recurring areas.

CO2 lasers have a role because they can precisely remove or “unroof” diseased tissue while sparing more of the
surrounding skin than some traditional approaches. Think of it as targeted remodelingless “demolish the whole
building,” more “remove the problem hallway that keeps collapsing.”

U.S./Canadian HS clinical management guidelines discuss procedural approaches like deroofing and excision for
recurrent nodules and tunnels, and they note that CO2 laser excision/marsupialization with secondary-intention
healing can be associated with low recurrence, though healing can take longer. That’s a key theme you’ll see again:
good outcomes are possible, but patience is part of the deal.

CO2 laser for HS: what it actually means (there’s more than one way)

“CO2 laser treatment” can refer to a few different techniques. Here are the most relevant ones for HS:

1) CO2 laser deroofing or tunnel ablation (great for tunnels)

If your HS includes persistent tunnels, the goal is often to open them up so they can heal from the inside out.
Traditional deroofing removes the “roof” of the tunnel. CO2 laser deroofing/ablation uses the laser to precisely
remove the tunnel’s top and unhealthy tissue.

In comparative research on HS tunnels, CO2 laser treatment has been evaluated alongside surgical deroofing, with
outcomes like healing time, pain, and scar appearance being measured. In one multicenter retrospective comparison,
healing time and pain scores favored the CO2 laser group, while overall tunnel healing outcomes at follow-up were
broadly comparable. Translation: laser may get you to “closed and calmer” faster in some cases,
though results depend on the patient and the lesion.

2) CO2 laser excision (sometimes with “marsupialization”) for recurring lesions

CO2 laser excision uses the laser to remove affected tissue. “Marsupialization” is a technique where the wound
edges are treated in a way that can help create a smooth, open defect designed to heal by
secondary intentionmeaning it heals naturally from the base up, rather than being stitched closed
right away.

This approach has been described in HS guidelines and literature as potentially associated with low recurrence in
treated areas, while also being associated with prolonged healing times in some patients. It’s a
trade: potentially durable results for a localized problem, but with a longer “healing season.”

3) CO2 laser resurfacing for HS scarring (a different goal)

Sometimes people hear “CO2 laser” and think of cosmetic resurfacing for scars. That can be part of HS care toobut
it’s a different conversation than using CO2 laser to treat active tunnels or recurrent lesions.

If your main issue is scarring after HS is better controlled, fractional CO2 laser resurfacing may be discussed for
scar texture in some settings. But most HS-focused CO2 laser discussions are about removing diseased tissue,
deroofing tunnels, or vaporizing recurring lesionsnot just “polishing” the surface.

What the evidence says (and what it doesn’t)

HS research is improving, but it’s still not the kind of condition where we have one perfect study that answers
everything for everyone. That said, several findings consistently show up across reputable sources:

• CO2 laser can be effective for localized, recurring HS lesions. In a long-cited clinical report
  using CO2 laser excision with secondary-intention healing, most patients were satisfied and recurrence in treated
  areas was limited, while disease could still appear in untreated regions. (That last part matters.)
• Recurrence can still happen, but satisfaction rates are often high. In one retrospective patient
  follow-up on CO2 laser evaporation with secondary-intention healing, recurrence within treated borders was
  reported by some patients, while most still reported improvement and would recommend the procedure.
• Healing time variesand can be weeks. Many reports describe healing windows on the order of
  several weeks, depending on lesion size, location, technique, and individual factors.
• Guidelines see procedures as part of comprehensive care. CO2 laser techniques are typically not
  “instead of everything,” but rather “in addition to a plan” that might include medical therapy, lifestyle
  modifications, and prevention strategies.

What the evidence does not say: that CO2 laser cures HS forever. Even Mayo Clinic notes that after CO2 laser
therapy, sores are unlikely to returnyet clinical studies still document recurrence in some treated areas and
continued activity in untreated areas. The most honest takeaway is: CO2 laser can be very helpful for the
right lesions, but HS is a whole-body inflammatory condition that may still need ongoing management.

Who may benefit most from CO2 laser treatment?

CO2 laser tends to make the most sense when HS is localized and/or when specific lesions keep
recurring in the same spot. Common “good fit” scenarios include:

• Persistent tunnels that don’t respond well to medication alone
• Hurley Stage II disease with defined tunnels in limited areas
• Recurrent nodules in a fixed location (the “same exact spot again? seriously?” pattern)
• Patients who want a tissue-sparing approach and may prefer less extensive excision when appropriate

CO2 laser may be less idealor require extra cautionif you have:

• Extensive, interconnected disease (often Hurley Stage III), where wide excision may be discussed
• Healing-risk factors such as uncontrolled diabetes or vascular issues
• Active smoking (smoking can impair healing and is linked with HS severity)
• Multiple widespread sites that would require many procedures

The best candidates are chosen based on a full evaluation, including where your disease is, how deep tunnels go,
how often you flare, and how your skin heals.

What the procedure and recovery can look like

Exact details vary by clinician and technique, but here’s the typical flowno scary soundtrack included.

Pre-procedure planning

Your dermatologist or surgeon will identify which areas are appropriate to treat. They may map tunnels clinically;
some practices also use imaging like ultrasound to define tunnels more clearly (availability varies). You’ll also
discuss anesthesia (often local for smaller areas), timing, wound care expectations, and whether you’ll continue
medications around the procedure.

Day-of treatment

CO2 laser HS procedures are often outpatient. After anesthesia, the laser is used to remove diseased tissue or
deroof tunnels. The goal is a clean wound bed that can heal. Many HS procedures are left to heal by secondary
intention, meaning you’ll be caring for an open wound as it closes naturally.

That sounds dramatic until you remember: your body is extremely good at healing when it’s given the right
conditions. (Also, it has been waiting for permission to stop hosting that tunnel.)

Aftercare and healing timeline

Expect wound care. This usually includes keeping the area clean, using appropriate dressings, and attending
follow-ups so your clinician can monitor healing and catch complications early. Healing time can range from a few
weeks to longer depending on the size and location of the treated area and your individual healing pace.

Plan for “practical life” issues: movement discomfort (especially in armpits/groin), dressing changes, and activity
modifications. If your job involves heavy lifting, friction, or long walks, ask your clinician what downtime is
realistic.

Risks, side effects, and realistic expectations

CO2 laser can be precise, but it’s still a procedure. Potential downsides include:

• Pain or tenderness during healing (often manageable, but varies)
• Infection risk (wound care and follow-up reduce this risk)
• Delayed healing, especially in high-friction areas
• Scarring (sometimes improved vs other approaches, but still possible)
• Pigment changes (more noticeable in some skin tones)
• Recurrence at the edges or within the treated zone in some patients

Two expectations that can save you a lot of disappointment:

• CO2 laser can treat what’s therebut it can’t “vaccinate” your whole body against HS.
  Untreated areas can still flare, and prevention still matters.
• Most HS wins are “less often, less intense, and more manageable,” not “never again.”
  That’s still a huge win.

CO2 laser plus medication: the tag-team approach

Many people do best when procedural treatment is paired with medical therapy. Depending on HS severity and your
health history, your plan might include antibiotics, anti-inflammatory treatments, hormonal options, or biologics.
The goal is to reduce new lesion formation while procedures handle tunnels and stubborn areas.

In other words: CO2 laser can remove the troublesome “infrastructure,” while medication tries to lower the chance
of new construction happening next door.

Cost and access: the unglamorous but important part

CO2 laser for HS may be covered by insurance when it’s done as a medically necessary procedure (coverage varies a
lot). Some laser centers focus on cosmetic lasers and may not be set up for HS surgical work. The most reliable
route is usually an HS-experienced dermatologist, dermatologic surgeon, or plastic surgeon familiar with HS
tunnels and wound healing.

If you’re considering it, ask the office:
Is this billed as an HS procedure (medical) or a cosmetic laser treatment?
That one question can save you a financial jump-scare later.

Questions to ask your dermatologist (bring this list)

• Is my HS pattern best suited for CO2 laser, deroofing, excision, or another approach?
• Are my lesions mainly nodules, abscesses, or tunnels?
• What is the expected healing time for my specific location (armpit vs groin vs buttocks)?
• How will pain be managed during and after the procedure?
• What wound care will I need at home, and how often will follow-ups be?
• What’s the chance I’ll need additional treatments in the same area?
• Should I continue my HS medications before/after the procedure?
• How do you handle recurrence at the margins or new lesions in nearby skin?

The bottom line: can CO2 laser help HS?

YesCO2 laser treatment can help hidradenitis suppurativa, especially for tunnels and recurring localized
lesions. Studies and clinical guidance support CO2 laser approaches as effective options for selected
patients, often with good satisfaction and potentially favorable healing/pain outcomes compared with some
traditional methods in certain settings.

But it’s not a one-size-fits-all solution. The best results happen when CO2 laser is used strategicallyaimed at the
right lesions, in the context of a broader HS management plan, with realistic expectations about healing time and
the possibility of recurrence.

If you’re dealing with tunnels that keep coming back, CO2 laser is absolutely worth discussing with an HS-experienced
dermatologist. At minimum, it’s a conversation that can move you from “I guess I’ll just suffer forever?” to
“Okay, we have optionsand a plan.”

Experiences With CO2 Laser for HS (Real-World Perspectives)

HS treatments can sound straightforward on paper: identify lesion, treat lesion, heal, move on. Real life is
messierliterally and emotionally. People who consider CO2 laser often arrive at the decision after months or years
of the same exhausting cycle: flare, pain, draining, temporary improvement, then the rude return of “that one spot”
that never really left.

One common experience is the feeling of relief that comes from a targeted plan. When a clinician explains that a
tunnel is basically a chronic pathway under the skin that likes to re-inflame, it can be oddly validating. People
often describe it as finally having a name for what they’ve suspected all along: “This isn’t just a random bump. It’s
a repeat offender.”

In real-world stories, CO2 laser is frequently described as a turning point for localized diseaseespecially
when the main goal is to eliminate a stubborn tunnel that keeps reopening. Some people report being surprised by how
manageable the procedure day feels (often outpatient, often with local anesthesia), and then being equally surprised
by how “real” the healing phase is afterward. The procedure can be quick compared with the weeks of healing that
follow. That doesn’t mean it’s a bad experience; it just means it’s not the kind of thing you schedule between
brunch and a spin class.

A very typical theme: wound care becomes a short-term part-time job. People often talk about learning a routine that
workswhat dressings feel best, how to reduce friction, how to time dressing changes around showers, and how to keep
their skin calmer during the healing process. The most successful experiences are usually the ones where the person
had clear instructions, realistic expectations, and follow-up support, rather than being sent home with vague advice
and a prayer.

Pain experiences vary. Some people say the treated area feels tender but less “deeply angry” than their worst HS
flares. Others find the first dressing changes annoying or uncomfortable, especially in high-movement areas like the
underarm or groin. A frequent comment is that laser-treated wounds can feel more “clean-edged,” while HS flares feel
chaotic and unpredictable. That sense of predictabilityknowing what’s normal healing versus what’s an HS flarecan
be emotionally calming all by itself.

Emotionally, many people describe a mix of hope and fear. Hope because they’ve seen the same spot flare repeatedly
and want it gone. Fear because they’ve been disappointed beforeand because any procedure in a sensitive area feels
intimidating. It’s common to worry about scarring, pigmentation changes, and whether the area will truly stay quiet.
The most helpful mindset shift people describe is reframing success: not “HS is cured forever,” but “this specific
tunnel is handled, and my baseline is better.”

Another real-world pattern: CO2 laser doesn’t always eliminate HS everywhereand that’s not failure. Some people
report excellent improvement in the treated zone while still experiencing occasional lesions elsewhere. When that
happens, many feel the overall burden is still significantly reduced because the worst, most chronic, most draining
area is no longer dominating their life. It’s the difference between putting out one massive, recurring fire versus
occasionally dealing with a small flare that responds to a plan.

People also often mention the importance of choosing the right clinician. HS tunnels are not the same as cosmetic
scar resurfacing, and patients who had the smoothest experiences frequently credit a provider who treats HS
regularlysomeone who can anticipate friction points (literally), explain healing timelines clearly, and adjust the
plan if the wound is slower to close than expected.

Finally, there’s a very human “win” that doesn’t show up in charts: confidence. When a person isn’t constantly
protecting a painful area, hiding dressings, or worrying about odor or leakage, they often describe feeling more
present in their daily life. They can wear what they want, move more freely, and stop planning every day around
“What if it flares?” That’s not a small outcome. That’s getting your life backone calmer patch of skin at a time.