Hidradenitis Suppurativa in Armpits: Symptoms and Treatments

If your underarms keep staging the same painful dramatender lumps, surprise drainage, and a comeback tour right when you need to wear a sleeveless topthere’s a chance you’re dealing with
hidradenitis suppurativa (HS). HS in the armpits (also called axillary HS) is one of the most common patterns because armpit skin is warm, sweaty, and full of frictionbasically a “perfect storm” environment for flares.

Here’s the important part: HS is not a hygiene problem, and it’s not contagious. It’s a chronic inflammatory skin condition that tends to recur, and the earlier you recognize it, the better your odds of slowing it down, reducing scarring, and getting your comfort (and range of motion) back.

What Underarm HS Actually Is (And Why It Loves Armpits)

Hidradenitis suppurativa is an inflammatory condition that starts around hair follicles. In HS, follicles can become blocked and inflamed. Over time, this can lead to painful nodules, abscesses, drainage, and in some cases “tunnels” (sinus tracts) under the skin that make flares harder to fully calm.

Armpits are a frequent target because they combine:

• Friction (skin rubbing, arm movement, seams)
• Sweat and heat (an occlusive, humid environment)
• Hair follicles and glands that can become inflamed
• Everyday irritants (shaving, waxing, certain deodorants)

Symptoms of Hidradenitis Suppurativa in the Armpits

HS can look like “just a boil” at firstuntil it keeps coming back in the same general neighborhood. Underarm HS often shows up as flares that cycle between swelling, pain, drainage, and partial healing.
The pattern matters as much as the bump.

Early Signs: More Than a Random Ingrown Hair

• Tender lumps under the skin (pea-sized to marble-sized or larger)
• Redness and warmth around a sore spot
• Deep aching or burning pain (often worse with arm movement)
• Two or more flares in the same underarm over time
• Paired or clustered bumps rather than a single isolated pimple

Abscesses and Drainage

As inflammation builds, lumps can turn into abscesses that may open and drain. People often describe:

• Drainage of fluid or pus
• Odor (usually from drainage and bacteria on the skin, not “being dirty”)
• Crusting and staining of clothing
• Relief after drainagefollowed by another flare later

Tunnels, “Double-Headed” Lesions, and Scarring

With ongoing HS, inflammation can create sinus tracts (tunnels) under the skin. Clues can include:

• Repeated drainage from the same spot
• Multiple openings connected under the skin
• Thickened, rope-like scars or firm bands in the underarm
• Limited arm movement because the skin feels tight or sore

When to Get Checked Sooner Rather Than Later

See a clinician (ideally a dermatologist) if you have recurring painful underarm lumps, drainage, or scarringespecially if it’s affecting sleep, work, exercise, or how you move your arms.
HS is often misidentified early, and delays can allow it to progress.

What Causes Underarm HS? Risk Factors and Triggers

HS doesn’t have one single cause. It’s best understood as a condition influenced by inflammation, genetics, hormones, and mechanical stress (like friction and pressure).

Common Risk Factors

• Family history (HS can run in families)
• Smoking (linked to more severe disease in many studies)
• Excess weight (may increase friction and inflammation; not a “fault,” just a factor)
• Hormonal influences (some people flare around menstrual cycles)
• Associated inflammatory conditions (for some: acne, metabolic issues, inflammatory bowel disease)

Common Underarm Triggers

• Shaving nicks, waxing, or irritating hair removal
• Harsh deodorants (fragrance, alcohol, baking soda, dyes can irritate sensitive HS skin)
• Tight clothing or rough seams that rub
• Heat and sweat (summer, workouts, hot commutes)
• Stress and poor sleep (not “the cause,” but can worsen flares)

How HS in the Armpits Is Diagnosed

HS is typically diagnosed clinicallymeaning your clinician looks at the pattern of lesions, where they occur, and how often they come back. There isn’t one “magic blood test” that confirms HS.

What Clinicians Look For

• Typical locations (armpits are classic)
• Recurring lesions over months
• Characteristic bumps (deep nodules/abscesses, scarring, tunnels)

Hurley Staging (A Simple Severity Snapshot)

Many clinicians use the Hurley staging system to describe severity:

• Stage I: Abscesses or nodules without tunnels or significant scarring
• Stage II: Recurrent abscesses with tunnels and scarring, but separated areas of involvement
• Stage III: Diffuse involvement with interconnected tunnels and extensive scarring across the region

What HS Can Be Mistaken For

Underarm HS can resemble folliculitis, infected cysts, or recurring “boils.” The difference is the
recurrent pattern, the tendency to form tunnels, and the way lesions can cluster and scar.

Treatments for Hidradenitis Suppurativa in the Armpits

HS treatment isn’t one-size-fits-all. Most plans combine three goals:
(1) reduce inflammation, (2) prevent new lesions, (3) protect skin from friction and irritation.
Treatment often “steps up” based on severity and how often you flare.

1) Underarm Skin Care That Supports HS (Not Aggravates It)

• Use an antimicrobial wash (gently): Many dermatologists recommend washes that help reduce bacteria on the skin,
  such as products containing benzoyl peroxide or zinc pyrithione. Don’t scrubHS skin doesn’t need punishment.
• Choose a “boring” deodorant: Look for a mild antiperspirant or deodorant without common irritants like
  alcohol, fragrance, dyes, parabens, or baking soda. If your underarms sting when you apply it, take that as a vote of no confidence.
• Rethink hair removal: Waxing often worsens HS. If you shave, take precautions (cleanse first, use a protective shaving gel, avoid going over inflamed skin).
  Many people do better with a trimmer/electric razor rather than a close shave.
• Reduce friction: Soft, breathable fabrics and seamless or loose armholes can reduce rubbing.
  If a shirt seam hits the exact spot where you flare, that’s not fashionit’s sabotage.
• Dressings for drainage: Non-stick dressings can protect skin, reduce odor, and save your clothes. A clinician can recommend options that won’t tear fragile areas.

2) What to Do During a Flare

The instinct to squeeze or “pop” a lump is understandableand usually unhelpful for HS. It can increase trauma, worsen inflammation, and raise infection risk.
Better flare strategies include:

• Warm compresses for comfort and to encourage gentle drainage
• OTC pain relief as appropriate (ask your clinician if you have medical conditions or take other meds)
• Topical numbing options (some clinicians recommend topical lidocaine for pain)
• Keep the area clean and protected with a non-adherent dressing if draining

Seek urgent care if you develop fever, rapidly spreading redness, severe worsening pain, or you feel generally unwellthose can be signs of a more serious infection.

3) Prescription Topicals and Pills for Mild to Moderate Underarm HS

For many people, the first medical step is reducing inflammation and bacterial overgrowth at the skin level.

• Topical clindamycin: Often used for mild HS and as part of combination plans.
• Resorcinol (peel-style topical): Sometimes used to help open clogged follicles and reduce inflammation (your clinician should guide use to reduce irritation).
• Oral antibiotics: Tetracyclines (like doxycycline) may be used for anti-inflammatory effects; some regimens combine antibiotics for tougher cases.
• Intralesional steroid injections: A clinician can inject corticosteroid into a painful nodule to reduce inflammation and tenderness more quickly.
• Hormonal therapy (selected patients): Some women benefit from estrogen-containing birth control or medications such as spironolactone, depending on symptoms and medical history.

4) Biologic Medications for Moderate to Severe HS

Biologics are targeted immune-modulating treatments used when HS is more severe, frequent, or scarringor when other therapies aren’t enough.
As of recent FDA approvals for adults with moderate to severe HS, biologic options include:

• Adalimumab (TNF inhibitor)
• Secukinumab (IL-17A inhibitor)
• Bimekizumab-bkzx (targets IL-17A and IL-17F)

These medications require medical screening and follow-up (for example, checking for infections like TB before certain biologics). The upside: for many patients, biologics can reduce the number of inflammatory nodules and abscesses, help prevent new lesions, and improve quality of life.

5) Procedures and Surgery: When Underarm HS Needs a Mechanical Fix

HS isn’t always solved by medication alone, especially if tunnels and scarring have formed. Procedural options may include:

• Deroofing (unroofing): Removing the “roof” over tunnels so they can heal from the inside out.
  This is often more effective long-term than simple incision and drainage for chronic HS tracts.
• Laser approaches: Laser hair removal (often with long-pulsed Nd:YAG for appropriate candidates) may reduce flares by targeting follicles.
  Some CO₂ laser techniques can treat tunnels in selected cases.
• Wide excision: In advanced HS, removing affected skin may be necessary, followed by wound management and sometimes reconstruction.

Preventing Underarm HS Flare-Ups: Practical, Real-World Strategies

You can’t “perfect routine” your way out of HS, but supportive habits can reduce irritation and make medical treatments work better.
Think of this as lowering the everyday background noise so your treatment plan can be heard.

Underarm-Friendly Daily Habits

• Go gentle: Cleanse without scrubbing. HS skin flares with friction.
• Dress for airflow: Breathable fabrics, looser armholes, fewer abrasive seams.
• Choose low-irritant products: Mild deodorant/antiperspirant; patch test new products.
• Heat and sweat management: Change out of damp workout clothes quickly; consider moisture-wicking layers.
• Track triggers: Stress, heat, certain clothing, shaving methodspatterns matter more than perfection.

Health Factors That Can Influence HS Severity

Clinicians often discuss smoking cessation and weight management because both are linked with HS severity for many patients.
If those topics feel loaded, it’s okay to ask for a respectful, step-by-step plansmall changes can still matter.

Diet is a popular HS discussion. Some people report improvement with an anti-inflammatory approach (like Mediterranean-style eating) or by identifying specific personal triggers.
The evidence is still evolving, so it’s best treated as “worth experimenting safely” rather than “guaranteed cure.”

Frequently Asked Questions About HS in the Armpits

Is HS in the armpits just an infection?

HS can become secondarily infected, but HS itself is primarily an inflammatory condition. That’s why treatment often targets inflammation and follicular blockagenot just bacteria.

Should I stop using deodorant?

Not necessarily. Many people do better switching to a mild, low-irritant deodorant or antiperspirant.
If a product burns, stings, or triggers flares, it’s not “working through it”it’s a sign to change strategy.

Can I shave my underarms if I have HS?

Many people can, but it may worsen flares if you nick skin or shave too close. Avoid shaving over active lesions.
Consider trimming instead, and skip waxing (waxing commonly irritates HS-prone skin).

Will underarm HS go away?

HS is typically chronic, but symptoms can be controlled. With early diagnosis, consistent treatment, and a friction-reducing routine, many people see fewer flares and less scarring over time.

Experiences Related to Underarm HS: What People Commonly Describe (And What Helps)

HS is medical, but living with it is intensely practicalbecause armpits are involved in everything from driving to hugging to simply putting on a shirt.
Here are composite, real-world experiences that many people with hidradenitis suppurativa in the armpits report, along with lessons that often make day-to-day life easier.
(Your experience may differ, and a dermatologist can help tailor solutions.)

1) “It’s not the bumpit’s the unpredictability.”
A common frustration is not knowing when a flare will strike. People describe “quiet” weeks followed by a painful lump that appears overnightright before a presentation, travel day, or gym class.
Many find that tracking patterns helps: heat waves, stressful weeks, certain shirts, or shaving too close can line up with flares. Even when triggers aren’t obvious, tracking can help your clinician adjust treatment sooner rather than later.

2) “Deodorant became a science experiment.”
Underarm products can be surprisingly polarizing for HS skin. Some people do fine with standard antiperspirants, while others flare with fragranced formulas or “natural” products that rely on baking soda.
A frequent turning point is switching to a mild, fragrance-free option and avoiding alcohol-based formulas. Another practical trick: applying deodorant to completely dry skin and using a light handno aggressive rubbing like you’re sanding a table.

3) “Shaving was the spark; trimming was the peace treaty.”
Plenty of people connect flare-ups to shavingespecially quick “dry shaves,” dull blades, or shaving over tender areas.
Switching to an electric trimmer often reduces nicks and irritation. Others reserve shaving for calm periods and use protective shaving gel plus gentle cleansing beforehand.
The goal is less about hair and more about avoiding micro-injuries that can trigger inflammation.

4) “Drainage management changed my whole mood.”
When HS lesions drain, the practical impact can be hugestaining shirts, worrying about odor, and feeling on-edge in public.
People often report relief when they find a reliable wound-care setup: non-stick dressings, breathable tape (or alternatives if adhesives irritate), and a routine for changing dressings discreetly.
This isn’t “overreacting”it’s quality-of-life engineering. Once drainage is contained, many feel more comfortable leaving the house and moving normally.

5) “The best treatment plan wasn’t one thingit was a stack.”
Underarm HS often improves most when treatments are combined: a gentle wash, low-irritant deodorant, reduced friction, plus medical therapy such as topical clindamycin, oral antibiotics, or (for moderate to severe disease) a biologic.
People with tunnel-forming HS often describe procedures like deroofing as a major turning pointespecially when repeated flares kept coming from the same tract.
And for some, laser hair removal feels less like a cosmetic choice and more like a preventive strategy.

6) “Getting the right diagnosis was emotional.”
Many people report years of being told it was “just boils” or that they needed to scrub more.
Hearing “This is HS” can bring mixed feelings: fear, relief, anger, validationall at once.
What helps: a clinician who treats HS routinely, a plan that’s written down, and permission to talk about pain and mental health, not just skin.

If you recognize yourself in these experiences, the most important step is simple: bring it up.
You deserve care that takes your pain seriouslyand HS is treatable, especially when addressed early and consistently.

Wrap-Up

Hidradenitis suppurativa in the armpits can be painful, frustrating, and stubbornbut it’s also a condition with a growing toolbox of treatments.
If you’re dealing with recurring underarm lumps, drainage, or scarring, don’t settle for “It’s probably just a boil.”
With the right diagnosis, a friction-friendly skin routine, and medical therapy matched to severity, many people reduce flare-ups and protect their skin long-term.