Autoimmune Blisters in the Mouth and Peeling Gums (Pemphigus and Pemphigoid)

Medically reviewed by Dr. CJ Henley, DMD, general dentist, Jacksonville, FL · Last reviewed October 2026

Autoimmune blisters in the mouth are rare, and peeling gums are common, so let's start with the likely answer. If you've noticed thin white strings or a filmy layer coming off your gums or cheeks, it's usually your toothpaste, mouthwash, or nicotine pouches irritating the surface. That goes away once you switch. Gums that stay red, raw, and sore for weeks, or blisters that keep breaking into painful sores, are a different story. This page covers both.

Why are my gums peeling? Start with the everyday causes

Most people who ask us about peeling gums have nothing autoimmune going on. The lining of your mouth replaces its surface cells every few days, and certain products make those old cells come off in a visible film. It looks alarming in the mirror. It's usually harmless.

Peeling gums from toothpaste

Sodium lauryl sulfate (SLS), the foaming agent in most toothpastes, is the classic culprit. In controlled studies, SLS toothpaste held against the gums made the surface peel in most volunteers, while a detergent-free paste didn't. Whitening pastes, tartar-control formulas, and strong cinnamon flavors can do the same thing. Cinnamon can also cause a true allergic-type reaction with red, sore patches.

The giveaway: thin, white, stringy or filmy bits you can rinse or wipe away, with normal pink gum underneath, usually right after brushing. Little or no pain.

Mouthwash

Alcohol-based rinses, essential-oil rinses, and peroxide whitening rinses can cause the same sloughing, especially if you use them several times a day or swish for a long time.

Peeling gums from Zyn and other nicotine pouches

Nicotine pouches sit against the same spot for long stretches, and that spot often gets red, wrinkled, white, or peely. A 2026 Swedish study found mouth changes at the pouch site in about 8 in 10 regular users. Over time, the gum where the pouch sits can also pull back from the teeth. These changes usually fade after you stop. A white patch that's still there 2 to 3 weeks after quitting should be checked, because it can be leukoplakia.

Other harmless causes

• Burns from hot pizza or coffee peel and sting for about a week.
• Brushing too hard or a new, firm brush can scuff the surface.
• Acidic or very spicy food can leave the cheeks and gums tender and peely for a day or two.

If your gums are red, raw, and sore rather than just filmy, or if the peeling keeps going after you've changed products, that's when the autoimmune causes below come into the picture.

What autoimmune blisters in the mouth look like

Here's the confusing part: you often won't see a blister at all. The lining of the mouth is thin and gets rubbed constantly, so blisters tend to break almost as soon as they form. What people actually notice:

• Raw, shallow sores with ragged edges that keep appearing and don't heal on schedule.
• Red, shiny, tender gums that peel in patches, especially on the outer side of the front teeth. Doctors call this desquamative gingivitis.
• Flaps of loose, whitish skin at the edge of a sore.
• Blood blisters, more typical of pemphigoid.
• Pain with brushing, spicy food, or toothpaste, and gums that bleed easily.

There aren't good free-to-use photos of these conditions, so we've used illustrations here. If you're comparing your mouth to online pictures, remember that the gum pattern above (red, glazed, patchy) matters more than any one photo.

Pemphigus vulgaris in the mouth

Pemphigus vulgaris is a rare autoimmune disease where the immune system makes antibodies against desmoglein, a protein that holds skin and mouth-lining cells together. The cells lose their grip on each other and the surface falls apart easily.

• It often starts in the mouth. Painful pemphigus vulgaris mouth sores can show up weeks or months before any skin blisters, and some people only ever have mouth involvement.
• Where: inner cheeks, roof of the mouth, gums, tongue, and lips. The soft palate is a common spot. Sores can spread to the throat, making swallowing hurt.
• What they look like: irregular raw areas rather than neat round ulcers. Gentle rubbing of nearby normal-looking tissue can make it peel, which doctors call a positive Nikolsky sign.
• Who gets it: usually adults between 40 and 60. It's more common in people of Ashkenazi Jewish, Mediterranean, Middle Eastern, and South Asian background, but anyone can get it.

Is pemphigus vulgaris serious? Yes. Before modern treatment it was often fatal. Today it's very treatable, and most people reach remission, but it needs prompt care from a dermatologist. Don't wait it out.

Mucous membrane pemphigoid: oral signs, eyes, and other sites

Mucous membrane pemphigoid (MMP) is a group of rare autoimmune blistering conditions that mainly affect the moist linings of the body instead of the skin. Here the antibodies attack the anchor that holds the surface layer to the tissue underneath, so the whole surface lifts off.

• The mouth is the most common site. Peeling, red gums are often the first and only sign for a while. Blisters, sometimes blood-filled, can form on the palate and cheeks.
• Who gets it: mostly adults in their 60s and 70s, women more often than men.
• Other sites: eyes, nose, throat and voice box, esophagus, and genitals.

Mucous membrane pemphigoid and the eyes. This is the part that matters most. Pemphigoid in the eye can cause gritty, red, watery eyes that slowly scar, and untreated scarring can damage vision. If you have peeling gums or mouth blisters plus eye irritation that doesn't clear up, see an eye doctor promptly and tell them about your mouth.

One less common type of MMP is linked to some cancers, so your physician may suggest screening tests after diagnosis. That's a routine precaution, not a sign that something has been found.

Desquamative gingivitis: when peeling gums are a sign of something more

Desquamative gingivitis isn't a disease on its own. It's a description: gums that are bright red, glazed, sore, and peeling, often all the way up to where the gum meets the cheek. Regular gingivitis from plaque is puffy and red right at the gumline and bleeds when you floss. Desquamative gingivitis looks rawer and spreads further, and a cleaning alone doesn't fix it.

In the largest study of desquamative gingivitis causes, about 70% of people had oral lichen planus, about 14% had mucous membrane pemphigoid, and about 13% had pemphigus vulgaris. A few had rarer conditions. So when we see this pattern, lichen planus is the first thing on our mind, and a biopsy sorts out which one it is.

Plaque makes all of these worse. Sore gums are hard to brush, plaque builds up, and the gums get angrier. Gentle but thorough cleaning is part of the treatment.

Pemphigus vs. pemphigoid: what's the difference?

The names sound alike and both cause blisters, but the split happens at a different depth. That explains why they look and behave differently.

Bullous pemphigoid, which you may have heard of, is a cousin of MMP that mostly causes large, tense skin blisters in older adults. It involves the mouth less often.

How they differ from canker sores, thrush, and other look-alikes

Most mouth sores and most peeling aren't autoimmune. These are the things we usually need to tell apart.

Our guide to mouth ulcers sorts through the rest, and the autoimmune and systemic hub covers other whole-body conditions that show up in the mouth.

What causes autoimmune blisters in the mouth?

In both pemphigus and pemphigoid, the immune system makes antibodies against the proteins that glue the lining of the mouth together. Nobody fully knows why it starts. Genes play a part, which is why pemphigus is more common in certain ancestries. You can't catch these conditions, and they aren't caused by anything you ate or did.

Rarely, a medicine sets off a pemphigus-like reaction. Penicillamine and some blood pressure drugs, such as captopril, are the most familiar examples. If you've started a new medicine and then developed mouth blisters, mention it, but don't stop a prescription on your own.

Symptoms to watch for

• Mouth sores that keep coming and don't heal within 2 weeks
• Gums that are red, shiny, sore, and peeling, beyond what a product switch fixes
• Pain or burning with toothpaste, spicy food, or citrus
• Bleeding gums even with gentle brushing
• Blood blisters that keep coming back
• Pain when swallowing, hoarseness, or nosebleeds and crusting
• Gritty, red, or watery eyes that don't settle
• Skin blisters that break easily and leave raw spots
• Weight loss because eating hurts

Who diagnoses pemphigus and pemphigoid, and with what tests

A dentist can't diagnose these from looking, and neither can anyone else. The diagnosis comes from a biopsy and lab tests, and the condition is managed by a dermatologist or an oral medicine specialist.

• Biopsy for standard pathology. A small piece of affected tissue shows where the split is.
• Biopsy for direct immunofluorescence (DIF). This is the key test. A sample from normal-looking tissue right next to a sore is placed in a special transport solution (not the usual formalin) so a lab can stain the antibodies stuck in the tissue. Pemphigus and pemphigoid light up in different patterns.
• Blood tests. Antibody levels against desmoglein (for pemphigus) or BP180 and related proteins (for pemphigoid) help confirm the diagnosis and track treatment.
• Eye exam. Anyone with pemphigoid should have an eye doctor check for early scarring, even without symptoms.

The DIF sample has to be taken and handled the right way, which is why these biopsies are usually done by an oral medicine specialist, an oral surgeon, a periodontist, or a dermatologist. If we suspect an autoimmune cause, we'll document what we see, take photos, and refer you to someone set up for this testing. Learn more about how we approach diagnosing mouth problems.

How long it lasts

Product peeling clears up within a few days to 2 weeks of switching.

Pemphigus and pemphigoid are long-term conditions that come and go. With treatment, most people get the mouth under good control. Many with pemphigus vulgaris eventually reach full remission off all medicine, though flares can happen years later. Mucous membrane pemphigoid tends to be more stubborn and often needs ongoing treatment, especially when the eyes are involved. The mouth is often the last place to settle down, so it's normal for gums to stay tender for a while after the skin has cleared.

Mouth care that helps peeling gums and mouth blisters

Home care won't cure an autoimmune condition, but it makes a big difference in comfort and helps prescription treatment work.

1. Switch to a gentle toothpaste. SLS-free, no whitening, no tartar control, no cinnamon. A mild or unflavored paste is easiest on raw gums.
2. Use an extra-soft brush. Brush slowly with small strokes. A small-headed brush reaches around sore spots without scrubbing them.
3. Keep cleaning between your teeth. Use soft picks or a water flosser on a low setting if floss hurts. Less plaque means calmer gums.
4. Rinse a few times a day with warm salt water (½ teaspoon in a cup of water) or baking soda water. Skip alcohol and whitening rinses.
5. Eat soft, cool, bland foods during flares. Avoid chips, crusty bread, citrus, tomato, and spicy food. Use a straw for acidic drinks.
6. Use your prescription correctly. Dry the area first, apply a thin layer, and don't eat or drink for about 30 minutes. If you have a custom tray, wear it for the time we recommend.
7. Watch for thrush. White patches that wipe off, or a new burning feeling, can mean yeast from steroid use. Let us know.
8. Take photos of flares to show your dermatologist and us.

Our home care instructions cover brushing and flossing technique in more detail.

Over-the-counter options

These help with comfort. They don't treat pemphigus or pemphigoid.

Pemphigus vulgaris and mucous membrane pemphigoid treatment

Your dermatologist or oral medicine specialist leads treatment, and the plan depends on how widespread it is.

• Pemphigus vulgaris treatment usually combines corticosteroids with rituximab, an infused medicine that resets the antibody-making cells. In major studies, most people reached complete remission and needed far less steroid than with steroids alone. Other options include mycophenolate and azathioprine.
• Mucous membrane pemphigoid treatment depends on the sites involved. Mild disease limited to the mouth is often treated with strong topical steroids. When it's more widespread, or the eyes are involved, physicians use medicines like dapsone, doxycycline or other tetracyclines, methotrexate, mycophenolate, rituximab, and sometimes stronger drugs.
• Topical steroids for the mouth, such as clobetasol or fluocinonide gel, are used in both conditions to calm the gums and sores while the main medicine takes effect.

These medicines lower your immune defenses, so your care team will watch for infections and side effects. Tell us about any of them before dental treatment.

What a dentist can do

We don't diagnose or manage pemphigus or pemphigoid. Your physicians do. What we can do for your mouth makes a real difference, though.

• Notice and document. Peeling gums often show up at a routine cleaning first. We look at the pattern, take photos, and check for simpler causes like a toothpaste reaction or a rough filling. A thorough comprehensive exam includes the soft tissues, not just the teeth.
• Rule out product and habit causes before anything else. A simple product switch solves many cases.
• Refer for biopsy and coordinate. We'll send you to an oral medicine specialist, oral surgeon, periodontist, or dermatologist for the right biopsy, and share our findings and photos with them.
• Make custom medication trays. Thin, soft trays that fit over your teeth and gums hold a steroid gel against the gums for a set time. This tends to work much better than dabbing gel on with a finger.
• Prescribe for the mouth in coordination with your physician, including steroid gels or rinses and treatment for thrush when it develops.
• Keep plaque down gently. More frequent, gentler cleanings, sometimes with a numbing gel first, help gums heal. We can adjust timing around flares.
• Smooth sharp edges and fix rubbing dentures, which can set off new blisters.

Dr. Henley sees many patients with complex medical histories and works directly with their physicians. Our medically complex care page explains how that works.

Dental visit tips if you have pemphigus or pemphigoid

• Tell us your diagnosis and current medicines, including steroids, rituximab infusion dates, and immune-suppressing drugs.
• Schedule routine work when you're in a quiet phase if you can. We can postpone elective treatment during a flare and focus on comfort.
• Expect lip protection. We coat your lips and corners with a gentle lubricant so instruments don't drag and tear tissue.
• Expect us to go gently with suction, cheek retractors, and polishing, and to choose mild, unflavored pastes.
• Bring your custom trays so we can check the fit.
• If you've been on long-term steroids, ask your physician whether you need any adjustment before a bigger procedure.
• If you take bone-strengthening medicine because of steroid use, let us know before any extraction. Our page on osteoporosis medications explains why.

Preventing flares and irritation

You can't prevent an autoimmune condition from starting. You can cut down on the things that set off new sores and peeling.

• Stick with gentle, SLS-free toothpaste for good, not just during flares.
• Avoid crunchy, sharp, and spicy foods when your mouth is tender.
• Get rough fillings, chipped teeth, and loose dentures fixed. Rubbing triggers new blisters.
• Keep plaque low with gentle daily cleaning and regular professional cleanings.
• Take your medicines as prescribed, and keep follow-up visits even when you feel well.
• Skip nicotine pouches and tobacco. They irritate the lining and make healing harder.

Special situations

Children

Pemphigus and pemphigoid are very rare in kids. Blisters in a child's mouth are far more likely to be hand, foot, and mouth disease, a first herpes infection, or a burn. A child with blisters who won't drink should be seen the same day by a pediatrician.

Pregnancy

If you have pemphigus or pemphigoid and are pregnant or planning to be, your dermatologist and OB will choose medicines together, since some drugs used for these conditions aren't safe in pregnancy. Routine dental care is safe and helpful during pregnancy.

Denture wearers

Dentures that rock or rub can trigger new blisters and sores. A reline or a soft liner often helps, and we may suggest leaving dentures out more during flares.

People on immune-suppressing medicine

Thrush and cold sore flares are more common. Any new type of sore deserves a look. Infections can also need treatment sooner than usual.

Cancer treatment

Mouth sores during chemotherapy or radiation are usually mucositis, which is a different problem. See our head and neck cancer dental care page.

Doctor, dentist, or eye doctor? When to get help

Autoimmune mouth blisters and peeling gums FAQ

Related conditions

Sources

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2. Joly P, et al. Updated S2K guidelines on the management of pemphigus vulgaris and foliaceus initiated by the European Academy of Dermatology and Venereology (EADV). J Eur Acad Dermatol Venereol. 2020;34(9):1900–1913.
3. Schmidt E, et al. European Guidelines (S3) on diagnosis and management of mucous membrane pemphigoid, initiated by the European Academy of Dermatology and Venereology, Part II. J Eur Acad Dermatol Venereol. 2021;35(10):1926–1948.
4. Leao JC, Ingafou M, Khan A, Scully C, Porter S. Desquamative gingivitis: retrospective analysis of disease associations of a large cohort. Oral Dis. 2008;14(6):556–560.
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6. Daneshian M, Fredriksson L, Skott P, Garming Legert K. Oral lesions and dental status in individuals using oral tobacco-free nicotine pouches. Oral Dis. 2026.

This page is for general education and isn't a diagnosis. Every mouth is different. If you have a sore you're worried about, see your dentist or physician. Photos marked Wikimedia Commons are used under their listed licenses and may have been cropped or resized.