Skip to content
How It Works
Explore
Resources Ask a Question
Who It's For
Patients
Decode results, prep for appointments, weigh options.
Caregivers & advocates
Carry the research load for someone you love.
Providers & clinicians
Resources for patients in your practice.
Log In Ask a Question
PubMed This is a summary of 14 peer-reviewed journal articles Updated
Dermatology

Recognizing the Signs: How Pemphigus Vulgaris Behaves

At a Glance

Pemphigus Vulgaris typically begins with painful, persistent mouth sores before progressing to fragile skin blisters. The disease weakens the proteins holding skin cells together, causing blisters that rupture easily and leave open sores vulnerable to infection.

The symptoms of Pemphigus Vulgaris (PV) are unique because of how the disease affects the “glue” that holds your skin cells together. Because this “glue” is missing or weakened, the blisters that form are extremely fragile and behave differently than the common blisters you might get from a burn or a poorly fitting shoe.

The Progression of Symptoms

For approximately 90% of patients, PV begins in the mouth [1]. These initial oral symptoms often look like painful, jagged, and persistent sores rather than clear blisters [2][3]. This is because the lining of the mouth is so thin that the blisters rupture almost as soon as they form, leaving behind raw areas called erosions [4].

The disease can follow a predictable but variable timeline:

  • Mucosal Phase: Many patients experience only mouth sores for months or even a year before any other symptoms appear [5][6].
  • Cutaneous Phase: Eventually, the disease may progress to the skin, where it forms flaccid (soft or drooping) blisters [7]. These blisters are thin-roofed and easily broken by the slightest touch, such as the friction of clothing or a towel [4][8].

Subtypes: Mucosal vs. Mucocutaneous

Your medical team will classify your PV based on where the symptoms appear and which “glue” proteins (desmogleins) your immune system is attacking [9].

Feature Mucosal-Dominant PV Mucocutaneous PV
Primary Location Mostly the mouth and throat [9] Both the mouth/mucosa and the skin [9]
Antibody Profile Targets Desmoglein 3 (Dsg3) [9] Targets both Dsg3 and Dsg1 [9]
Blister Behavior Rarely see intact blisters; mostly raw sores [2] Clear, soft blisters on the skin that rupture easily [7]

Clinical Markers: The Nikolsky Sign

During an exam, your doctor may check for the Nikolsky sign. This is a classic clinical finding in PV that demonstrates acantholysis—the medical term for the loss of cell-to-cell adhesion [10].

  • How it is performed: A doctor applies firm, lateral pressure with a finger to the edge of an existing blister or to a patch of normal-looking skin [11][12].
  • What a “Positive” sign looks like: If the top layer of skin slides away easily or if a blister extends into the adjacent skin, the sign is positive [11].
  • What it means: A positive Nikolsky sign tells your doctor that your skin cells are not sticking together properly, which helps distinguish PV from other blistering diseases where the blisters are “tense” and do not spread when pressed [13][8].

What to Watch For

As you monitor your symptoms, pay close attention to:

  • Blister Fragility: Note if new blisters seem to pop almost instantly or if they are caused by simple tasks like sitting or reclining [4].
  • Infection Signs: Because PV creates open erosions, these areas are vulnerable. Watch for increased redness, swelling, warmth, or a “honey-colored” crust, which may indicate a secondary infection [14][3].
  • Spreading: Keep track of whether lesions are appearing in new mucosal areas, such as the eyes, nose, or genital region, as this can signal a shift in disease activity [9].

Next: Dive deeper into The Science of the ‘Unglueing’.

Common questions in this guide

What are the first signs of Pemphigus Vulgaris?
For most patients, Pemphigus Vulgaris begins in the mouth. You may notice painful, jagged, and persistent sores that look like raw areas rather than clear blisters because the lining of the mouth is so thin that blisters rupture almost instantly.
What is the difference between mucosal and mucocutaneous Pemphigus Vulgaris?
Mucosal PV primarily affects the mouth and throat and involves antibodies against Desmoglein 3. Mucocutaneous PV affects both the mucous membranes and the skin, involving antibodies against both Desmoglein 1 and 3.
What does a positive Nikolsky sign mean?
A positive Nikolsky sign means your skin cells are not sticking together properly. It happens when the top layer of skin slides away easily when pressed, which helps doctors identify Pemphigus Vulgaris and distinguish it from other blistering diseases.
What should I do if a Pemphigus Vulgaris blister ruptures?
Because ruptured blisters leave open sores, they are highly vulnerable to infection. You should watch for increased redness, swelling, warmth, or a honey-colored crust, and follow your doctor's specific wound care protocol to prevent complications.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Based on my antibody titers for desmoglein 1 and 3, which subtype of PV do I have—mucosal or mucocutaneous?
  2. 2.Is the presence of a positive Nikolsky sign on my skin a marker of how active my disease is right now?
  3. 3.What should I do if a blister ruptures? What is your recommended protocol for preventing infection in open erosions?
  4. 4.Are there specific 'red flags'—like a certain location of a blister or a change in its appearance—that should prompt an immediate call to your office?
  5. 5.How will we monitor the progression of my mucosal lesions, and can they spread to other areas like the eyes or throat?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (14)
  1. 1

    Prevalence of oral mucosal lesions in patients with pemphigus vulgaris: A systematic review and meta-analysis.

    Batistella EÂ, Sabino da Silva R, Rivero ERC, Silva CAB

    Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 2021; (50(8)):750-757 doi:10.1111/jop.13167.

    PMID: 33713362
  2. 2

    Nasal, oral, and pharyngolaryngeal manifestations of pemphigus vulgaris: Endoscopic ororhinolaryngologic examination.

    Ohki M, Kikuchi S

    Ear, nose, & throat journal 2017; (96(3)):120-127 doi:10.1177/014556131709600311.

    PMID: 28346642
  3. 3

    An Oral Disease Severity Score validated for use in oral pemphigus vulgaris.

    Ormond M, McParland H, Donaldson ANA, et al.

    The British journal of dermatology 2018; (179(4)):872-881 doi:10.1111/bjd.16265.

    PMID: 29297927
  4. 4

    Esophageal involvement by pemphigus vulgaris resulting in dysphagia.

    Cecinato P, Laterza L, De Marco L, et al.

    Endoscopy 2015; (47 Suppl 1 UCTN()):E271-2 doi:10.1055/s-0034-1391905.

    PMID: 26099087
  5. 5

    Paraneoplastic Pemphigus Mimicking Pemphigus Vulgaris Associated With Castleman Disease.

    Grigore M, Costache M, Simionescu O

    Cureus 2023; (15(3)):e36114 doi:10.7759/cureus.36114.

    PMID: 37065416
  6. 6

    Unusual Presentation of Pemphigus Vulgaris as a Solitary Ulcerative Scalp Lesion: A Case Report.

    Nejjari S, Basri G, Chikhaoui I, et al.

    Cureus 2025; (17(6)):e87025 doi:10.7759/cureus.87025.

    PMID: 40600094
  7. 7

    Current status and prospects for the diagnosis of pemphigus vulgaris.

    Nili A, Salehi Farid A, Asgari M, et al.

    Expert review of clinical immunology 2021; (17(8)):819-834 doi:10.1080/1744666X.2021.1945925.

    PMID: 34162306
  8. 8

    Bullous pemphigoid and pemphigus vulgaris.

    Kayani M, Aslam AM

    BMJ (Clinical research ed.) 2017; (357()):j2169 doi:10.1136/bmj.j2169.

    PMID: 28596152
  9. 9

    The involvement of ADAM10 in acantholysis in mucocutaneous pemphigus vulgaris depends on the autoantibody profile of each patient.

    Ivars M, España A, Alzuguren P, et al.

    The British journal of dermatology 2020; (182(5)):1194-1204 doi:10.1111/bjd.18382.

    PMID: 31370093
  10. 10

    [Ultrastructure of epidermocytes in true pemphigus acantholysis].

    Lykova SG, Marinkin IO, Nemchaninova OB, et al.

    Arkhiv patologii 2019; (81(1)):3-8 doi:10.17116/patol2019810113.

    PMID: 30830098
  11. 11

    Nikolsky's sign: A pathognomic boon.

    Maity S, Banerjee I, Sinha R, et al.

    Journal of family medicine and primary care 2020; (9(2)):526-530 doi:10.4103/jfmpc.jfmpc_889_19.

    PMID: 32318376
  12. 12

    Beyond the Surface: A Clinical Insight Into a 60-Year-Old Male With Pemphigus vulgaris.

    Akel M, Wright M, Aladum B, Hernandez Borges S

    Cureus 2024; (16(2)):e54408 doi:10.7759/cureus.54408.

    PMID: 38505433
  13. 13

    Review of autoimmune blistering diseases: the Pemphigoid diseases.

    Daniel BS, Murrell DF

    Journal of the European Academy of Dermatology and Venereology : JEADV 2019; (33(9)):1685-1694 doi:10.1111/jdv.15679.

    PMID: 31087464
  14. 14

    Identification of factors associated with treatment refractoriness of oral lesions in pemphigus vulgaris.

    Kumar S, De D, Handa S, et al.

    The British journal of dermatology 2017; (177(6)):1583-1589 doi:10.1111/bjd.15658.

    PMID: 28498563

This page explains Pemphigus Vulgaris symptoms and disease progression for educational purposes only. Always consult your dermatologist or healthcare provider for an accurate diagnosis and personalized medical advice.

Get notified when new evidence is published on Pemphigus vulgaris.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.