List of Abbreviations
ICD – International Classification of Diseases
PODSI — Perioral Dermatitis Severity Index
Terms and Definitions
Perioral dermatitis (syn.: rosacea-like dermatitis, photosensitive dermatitis, steroid-induced dermatitis, photosensitive seboroid) is a chronic, relapsing facial skin disease manifested by erythematous-papular, papulovesicular, and less commonly papulopustular eruptions predominantly in the perioral region.
1. Brief information on the disease or condition
1.1 Definition of the disease or condition
Perioral dermatitis (syn.: rosacea-like dermatitis, photosensitive dermatitis, steroid-induced dermatitis, photosensitive seboroid) is a chronic, relapsing facial skin disease manifested by erythematous-papular, papulovesicular, and less commonly papulopustular eruptions predominantly in the perioral region [1, 2, 44].
1.2 Etiology and pathogenesis of the disease or condition (group of diseases or conditions)
The development of perioral dermatitis is promoted by the following factors:
- Prolonged use of corticosteroids (topically or systemically) and medications containing them [2, 5-7];
- Mites of the genus Demodex [8, 9];
- Infectious agents: yeast-like fungi of the genus Candida [6], obligate anaerobic bacteria [2, 10, 11];
- Use of cosmetic products (moisturizers, cleansers, sunscreens) having an occlusive effect [12–14];
- Use of fluoride-containing toothpastes [15–18];
- Ultraviolet radiation [2, 19].
Background conditions for the development of perioral dermatitis may include: use of contraceptive medications, pregnancy, impaired skin barrier function, including in patients with atopic dermatitis using topical corticosteroids [8, 15, 20, 21].
1.3 Epidemiology of the Disease or Condition
The prevalence of perioral dermatitis in the population is 0.5–1%, predominantly affecting women aged 15–45 years. Perioral dermatitis can occur in childhood, with the peak incidence in puberty, and the disease is more frequently observed in boys [3]. About 2% of patients visiting a dermatologist suffer from perioral dermatitis. Fair-skinned individuals are affected more often [4].
1.4 Features of Coding the Disease or Condition
Code according to the International Classification of Diseases ICD-10 —
L71.0 Perioral dermatitis
1.5 Classification of the disease or condition
There is no universally accepted classification of perioral dermatitis.
1.6 Clinical presentation of the disease or condition
Depending on the severity of clinical manifestations, mild, moderate, and severe forms of perioral dermatitis are distinguished. Severe perioral dermatitis includes granulomatous perioral dermatitis [22, 44].
To determine the severity of perioral dermatitis, the PODSI index has been developed, which is based on assessing the severity of clinical manifestations such as erythema, papules, and desquamation (Appendix G1).
The disease is characterized by clearly demarcated erythema of varying severity, as well as dome-shaped, non-follicular, pinkish-red papules, papulovesicles, less commonly papulopustules, 1–2 mm in diameter, which are localized in the perioral and periorbital areas, nasolabial folds, and may also spread to the skin of the chin and cheeks. A characteristic feature of perioral dermatitis is a narrow rim of pale, lesion-free skin around the vermilion border of the lips [22].
In the granulomatous form of perioral dermatitis, reddish-brown, less commonly skin-colored papules are observed, which may be localized not only in typical areas for the disease, but also on the skin of the neck, trunk, and extremities. Diascopy reveals a positive "apple jelly" sign [24].
2. Diagnostics, medical indications and contraindications for diagnostic methods
The diagnosis of perioral dermatitis is based on an examination by a dermatovenereologist, analysis of medical history, and clinical presentation. History data and typical clinical presentation are used as diagnostic criteria.
It is recommended to confirm the diagnosis based on the clinical presentation and an examination by a dermatovenereologist [58].
GCR CLEL 5Grade of Recommendation — C (Level of Evidence — 5)
2.1 Complaints and Anamnesis
Typical complaints of patients with perioral dermatitis include a sensation of burning, soreness, as well as tightness and tension of the skin in the affected area. Itching may occur, but is not characteristic [25, 57].
2.2 Physical Examination
Objective clinical manifestations of perioral dermatitis detected during physical examination are described in the "Clinical Presentation" section.
2.3 Laboratory Diagnostics
Additional laboratory tests are not indicated for the diagnosis of perioral dermatitis.
It is not recommended to perform microscopic examination of skin scrapings for mites to detect Demodex spp. and microorganisms or culture of pustule contents for diagnostic purposes [25].
GCR CLEL 5Grade of Recommendation — C (Level of Evidence — 5)
2.4 Instrumental Diagnostics
Not applicable.
2.5 Other Procedures
Not applicable.
3. Treatment, including drug and non-drug therapies, diet therapy, and pain management
The choice of drug and treatment method for perioral dermatitis depends on the severity and stage of the disease. For the duration of treatment, regardless of the chosen therapy method, the use of cleansing and moisturizing cosmetics, decorative cosmetics, fluorinated toothpastes, as well as topical and systemic drugs containing corticosteroids or D07 Corticosteroids, dermatological preparations, is discontinued (when discontinuing systemic preparations containing systemic corticosteroids, it is necessary to consider the indications for which the drugs were prescribed, and the patient should be advised to consult the prescribing physician regarding the possible discontinuation of the drug) [1, 11, 14, 27, 28].
3.1 Conservative Treatment
"Zero" therapy (or zero-therapy), topical therapy, and systemic therapy for perioral dermatitis are used.
"Zero" therapy
It is recommended for mild perioral dermatitis that "zero" therapy, which consists of discontinuing all topical products, including cosmetics, especially preparations containing corticosteroids, is sometimes sufficient. Improvement usually occurs within an average of 2 weeks [1, 11, 26, 29–31].
GCR BLoE 3Level of Evidence B (Level of Confidence of Evidence – 3)
Comments: If "zero" therapy is ineffective, drug therapy is prescribed. Topical therapy is prescribed for mild and moderate severity of the disease, used as monotherapy, and in severe perioral dermatitis can be prescribed in combination with systemic therapy (see Appendix B).
Topical therapy
It is recommended for topical therapy of perioral dermatitis in case of ineffectiveness of "zero" therapy:
#metronidazole 0.75-1% gel, cream, topically twice daily for 8 weeks [32, 50, 51].
GCR CLEL 5Grade of Recommendation — C (Level of Evidence — 5)
or
#azelaic acid 20% cream, topically twice daily for 2–6 weeks [33, 34].
GCR CLEL 4Grade of Recommendation — C (Level of Evidence — 4)
or
#pimecrolimus** 1% cream, topically twice daily for 4 weeks [18, 23, 35, 52].
GCR BLEL 2Grade of Recommendation — B (Level of Evidence — 2)
Systemic therapy is prescribed for severe forms of the disease, as well as when topical therapy is ineffective.
It is recommended for patients with severe forms of the disease and ineffectiveness of topical therapy with the following systemic therapy:
#tetracycline 250–500 mg orally twice daily for 4–8 weeks [29, 32, 33, 36, 37, 52, 53, 54, 55, 56].
GCR CLEL 5Grade of Recommendation — C (Level of Evidence — 5)
Comment: Prescribed to patients over 8 years of age.
or
#doxycycline** 100-200 mg daily orally for 4-8 weeks [37, 45, 46].
GCR CLEL 5Grade of Recommendation — C (Level of Evidence — 5)
Comment: Prescribed to patients over 8 years of age.
It is recommended in case of intolerance to tetracyclines, in pregnant women, children under the age of 8 years, and in the granulomatous form of perioral dermatitis in children:
#erythromycin 250 mg orally twice daily for 1 to 3–4 months [38–40, 54].
GCR CLEL 5Grade of Recommendation — C (Level of Evidence — 5)
Management in the absence of treatment response
It is recommended in case of ineffectiveness of antibacterial therapy in adults to prescribe #isotretinoin 0.1–0.5 mg per kg of body weight orally once daily for 6–20 weeks [41–43, 49, 50, 56].
GCR CLEL 5Grade of Recommendation — C (Level of Evidence — 5)
3.2. Surgical treatment
Not applicable.
3.3. Other treatment
Diet therapy is not indicated.
Pain management is not performed.
4. Medical Rehabilitation and Sanatorium-Resort Treatment
Not performed.
5. Prevention and Dispensary Observation
Prevention of disease development consists of the following:
- restriction of the use of corticosteroid-containing preparations;
- restriction of the use of cosmetics.
Dispensary observation (follow-up) is not performed.
6. Organization of Medical Care
There are no indications for hospitalization in a medical organization.
Medical care is provided within the framework of primary specialized health care by dermatovenereologists in an outpatient setting.
7. Additional Information
Information is not available.
Criteria for Evaluating the Quality of Medical Care
№ | Quality criteria | Grade of Recommendation | Level of evidence | |
|---|---|---|---|---|
1. | Confirmation of the diagnosis based on the clinical presentation and an examination by a dermatovenereologist | C | 4 | |
2. | "Zero" or zero-therapy in mild cases | C | 2 | |
3. | Topical therapy in case of ineffectiveness of "zero" therapy | B | 2 | |
4. | Systemic therapy with isotretinoin in case of ineffectiveness of antibacterial therapy | C | 3 | |
References
Show references
Adaskevich V.P. Akne vulgaris and rosacea. Moscow: Meditsinskaya Kniga; Nizhny Novgorod: NGMA Publishing House, 2003.
Potekaev N.N., Araviyskaya E.R., Sokolovskiy E.V. et al. Acne and rosacea. Moscow-St. Petersburg: BINOM, 2007.
Zeba H.H. Perioral dermatitis: an update. Int J Dermatol 2003; 42: 515–517.
Dirschka T. Periorale Dermatitis. Ruhr- Universität. Bochum, 2004.
Lipozencic J, Ljubojevic S. Perioral dermatitis. Clin Dermatol 2011; 29 (2):157–161.
Bradford L.G., Montes L.F. Perioral dermatitis and Candida albicans. Arch Dermatol 1972;105 (6): 892–895.
Takiwaki H., Tsuda H., Arase S., Takeichi H. Differences between intrafollicular microorganism profiles in perioral and seborrhoeic dermatitis. Clin Exp Dermatol 2003; 28 (5): 531–534.
Hafeez Z.H. Perioral dermatitis: an update. Int J Dermatol 2003; 42: 514–517.
Hsu C.K., Hsu M.M., Lee J.Y. Demodicosis: a clinicopathological study. J Am Acad Dermatol 2009; 60 (3): 453–462.
Berardi P., Benvenuti S., Genga A., Cecchini F. Demonstration of fusobacteria in eruptions of perioral dermatitis using the tape stripping toluidine blue (TSTB) method. J Eur Acad Dermatol Venereol 1994; 3: 495–499.
Olisova O.Yu., Gromova S.A. Periorbital dermatitis. Rus. Med. Zhurn. 2003; 11 (17): 972–975.
Clementson B., Smidt A.C. Periorificial dermatitis due to systemic corticosteroids in children: report of two cases. Pediatr Dermatol. 2012; 29 (3): 331–332.
Abele D.C. ‘Moisturizers’ and perioral dermatitis. Arch Dermatol. 1977; 113 (1): 110.
Malik R., Quirk C.J. Topical applications and perioral dermatitis. Australas J Dermatol 2000; 41 (1): 34–38.
Dirschka T., Szliska C., Jackowski J., Tronnier H. Impaired skin barrier and atopic diathesis in perioral dermatitis. J Dtsch Dermatol Ges 2003; 1 (3): 199–203.
Guarneri F., Marini H. An unusual case of perioral dermatitis: possible pathogenic role of neurogenic inflammation. J Eur Acad Dermatol Venereol 2007; 21 (3): 410–412.
Wollenberg A., Oppel T.. Scoring of skin lesions with the Perioral Dermatitis Severity Index (PODSI). Acta Derm Venereol 2006; 86: 254–255.
Oppel T., Pavicic T., Kamann S. et al. Pimecrolimus cream (1 %) efficacy in perioral dermatitis – results of a randomized, double-blind, vehicle-controlled study in 40 patients. J Eur Acad Dermatol Venereol 2007; 21: 1175–1180.
Fritsch P., Pichler E., Linser I. Periorale Dermatitis Hauterzt 1989;40: 475–479.
Karelin O.Yu., Gromova S.A. Perioral dermatitis: treatment with azelaic acid. Klin. Dermatol. Venerol. 2006; 3(86): 251–252.
Jansen T. Perioral dermatitis successfully treated with topical adapalene. J Eur Acad Dermatol Venereol. 2002;16(2):175–177.
Lebmann P. Periorale Dermatitis. In: Plewig G, Kaudewitz P, Sander CA (Hrsg) Fortscbritte der praktiscben Dermatologie und Venerologie. Bd 19. Berlin: Springer, 2005; s.515-517.
Schwarz T., Kreiselmaier I., Bieber T. et al. A randomized, double-blind, vehicle-controlled study of 1 % pimecrolimus cream in adult patients with perioral dermatitis. J Am Acad Dermatol 2008; 59: 34–40.
Tarm K., Creel N.B., Krivda S.J., Turiansky G.W. Granulomatous periorificial dermatitis. Cutis 2004; 73 (6): 399–402.
Tempark T., Shwayder T. A. Perioral dermatitis: a review of the condition with special attention to treatment options // American Journal of Clinical Dermatology. – 2014. – Vol. 15. – P. 101-113.
Weber K., Thurmayr R. Critical appraisal of reports on the treatment of perioral dermatitis. Dermatology 2005; 210: 300–307.
Mellette J.R., Aeling J.L., Nuss D.D. Letter: Fluoride tooth paste: a cause of perioral dermatitis. Arch Dermatol. 1976; 112 (5): 730–731.
Ferlito T.A. Tartar-control toothpaste and perioral dermatitis. J Clin Orthod. 1992; 26 (1): 43–44.
Weber K., Thurmayr R., Meisinger A. A topical erythromycin preparation and oral tetracycline for the treatment of perioral dermatitis: A placebocontrolled trial. J Dermatol Treat 1993; 4: 57–59.
Röckl H., Schubert E. Zur Therapie der sogenannten perioralen Dermatitis. Hautarzt 1971; 22: 527–531.
Schubert E., Beetz H.M., Röckl H. Über den Wert der Tetrazyklin-Therapie bei der perioralen Dermatitis. Hautarzt 1973; 24: 253.
Veien N.K., Munkvad J.M., Nielsen A.O. et al. Topical metronidazole in the treatment of perioral dermatitis. J Am Acad Dermatol 1991; 24: 258–260.
Jansen T. Azelaic acid as a new treatment for perioral dermatitis: results from an open study. Br J Dermatol 2004; 151: 933–934.
Jansen T, Grabbe S. Perioral dermatitis in childhood – Clinical features, etiopathogenesis and treatment with special reference to own experiences with the use of 20 % azelaic acid cream. Aktuelle Dermatologie 2007; 33: 180–183.
Rodriguez-Martin M., Saez-Rodriguez M., Carnerero-Rodriguez A. et al. Treatment of perioral dermatitis with topical pimecrolimus. J Am Acad Dermatol 2007; 56: 529–530.
Macdonald A., Feiwel M. Perioral dermatitis: aetiology and treatment with tetracycline. Br J Dermatol 1972; 87: 315–319.
Adams S.J., Davison A.M., Cunliffe W.J., Giles G.R. Perioral dermatitis in renal transplant recipients maintained on corticosteroids and immunosuppressive therapy. Br J Dermatol 1982; 106: 589–592.
Choi Y.L., Lee K.J., Cho H.J. et al. Case of childhood granulomatous periorificial dermatitis in a Korean boy treated by oral erythromycin. J Dermatol 2006; 33: 806–808.
Suh K. Y., Frieden I. J. Perioral dermatitis // Harper's Textbook of Pediatric Dermatology. – 2011. – Vol. 1. – P. 38.1-38.4.
Tolaymat L., Hall M.R. Perioral Dermatitis Treasure Island (FL): StatPearls Publishing; 2020 Jan
Brunner M., Megahed M., Hölzle E., Ruzicka T. Granulomatous perioral dermatitis in childhood. Treatment with isotretinoin. Akt. Dermatol 1995; 21: 60–62.
Nikkels A.F., Pierard G.E. Control of perimenstrual flares of perioral dermatitis by isotretinoin. J Dermatol Treat 2000; 11: 97–99.
Smith K.W. Perioral dermatitis with histopathologic features of granulomatous rosacea: successful treatment with isotretinoin. Cutis 1990; 46: 413–415.
Samtsov A.V. Acne and acneiform dermatoses. Monograph – Moscow: LLC "UTKOM", 2009. – 208 p.: ill.
S.G. Vanderweil; N.A. Levin Perioral Dermatitis: It"s Not Every Rash that Occurs Around the Mouth // Dermatology Nursing. 2009;21(6):317-320, 353.
Tolaymat L., Hall M.R. Perioral Dermatitis Treasure Island (FL): StatPearls Publishing; 2020 Jan.
Mokos Z.B., Kummer A., Mosler E.L., Čeović R., Basta-Juzbašić A. Perioral dermatitis: still a therapeutic challenge // Acta Clin Croat 2015; 54:179-185
Thiboutot D. Periorificial Dermatitis (perioral dermatitis). Dermatology Advisor.
Lipozenčić J, Hadžavdić SL. Perioral dermatitis. Clin Dermatol. 2014;32(1):125-130.
Tempark T., Shwayder T. A. Perioral dermatitis: a review of the condition with special attention to treatment options // American Journal of Clinical Dermatology. – 2014. – Vol. 15. – P. 101-113.
Manders S. M., Lucky A. W. Perioral dermatitis in childhood // Journal of the American Academy of Dermatology. – 1992. – Vol. 27. – No. 5. – P. 688-692. LEL 5 GCR C
Gray N. A. et al. Pharmacological interventions for periorificial (perioral) dermatitis in children and adults: a systematic review // Journal of the European Academy of Dermatology and Venereology. – 2022. – Vol. 36. – No. 3. – P. 380-390.
Reichenberg J., Dahl M. V., Ofori A. O. Perioral (periorificial) dermatitis // UpToDate. Waltham: UpToDate. Accessed. – 2019. – Vol. 24.
Tolaymat L., Hall M.R. Perioral Dermatitis Treasure Island (FL): StatPearls Publishing; 2020 Jan
Laude T. A., Salvemini J. N. Perioral dermatitis in children // Seminars in Cutaneous Medicine and Surgery. – 1999. – Vol. 18. – No. 3. – P. 206-209.
Searle T, Ali FR, Al-Niaimi F. Perioral dermatitis: Diagnosis, proposed etiologies, and management. J Cosmet Dermatol. 2021 Dec;20(12):3839-3848. doi: 10.1111/jocd.14060. Epub 2021 Mar 16. PMID: 33751778.
Plewig G. Periorale Dermatitis. In: Braun-Falco O., Wolff H.H., Burgdorf W.H., Landthaler M. eds. Dermatologie und Venerologie. Heidelberg: Springer, 2005: 907–909.
Adaskevich V.P., Medelents N.O. Diagnostics of perioral dermatitis. Vestnik VSMU. – 2019. – Vol. 18, No. 6. – P. 59-67.
Appendix A1. Working Group Composition
Kubanov Alexey Alekseevich — Academician of the Russian Academy of Sciences, President of the Association "Russian Society of Dermatovenereologists and Cosmetologists", Director of the State Research Center of Dermatovenereology and Cosmetology of the Russian Ministry of Health, Moscow.
Araviyskaya Elena Alexandrovna — Doctor of Medical Sciences, Professor of the Department of Dermatovenereology with Clinic at the First St. Petersburg State Medical University named after Academician I.P. Pavlov of the Russian Ministry of Health, Member of the Russian Society of Dermatovenereologists and Cosmetologists, St. Petersburg.
Monakhov Konstantin Nikolaevich – Doctor of Medical Sciences, Professor at the Department of Dermatovenereology with Clinic, Pavlov First Saint Petersburg State Medical University of the Ministry of Health of Russia, member of the Russian Society of Dermatovenereologists and Cosmetologists, St. Petersburg.
Chikin Vadim Viktorovich – Doctor of Medical Sciences, Senior Researcher at the Department of Dermatology, State Research Center of Dermatovenereology and Cosmetology of the Ministry of Health of Russia, member of the Russian Society of Dermatovenereologists and Cosmetologists, Moscow.
Vorontsova Anastasia Aleksandrovna – Junior Researcher at the Department of Dermatology, State Research Center of Dermatovenereology and Cosmetology of the Ministry of Health of Russia, member of the Russian Society of Dermatovenereologists and Cosmetologists, Moscow.
Conflict of Interest: The authors declare no conflict of interest.
Appendix A2. Methodology for Developing Clinical Guidelines
Target audience for these clinical guidelines:
Medical specialists: dermatovenereologists, cosmetologists.
Residents and trainees of continuing professional education programs in the specified specialty.
Table 1. Level of Evidence (LoE) grading scale for diagnostic methods (diagnostic interventions)
LoE | Definition |
|---|---|
1 | Systematic reviews of studies with reference standard control or systematic reviews of randomized controlled trials with meta-analysis |
2 | Individual studies with reference standard control or individual randomized controlled trials and systematic reviews of studies of any design, except randomized controlled trials, with meta-analysis |
3 | Studies without consecutive reference standard control or studies with a reference standard not independent of the test method, or non-randomized comparative studies, including cohort studies |
4 | Non-comparative studies, case report |
5 | Only justification of mechanism of action or expert opinion is available |
Table 2. Level of Evidence (LoE) grading scale for prevention, treatment, and rehabilitation methods (preventive, therapeutic, and rehabilitative interventions)
LoE | Definitions |
|---|---|
1 | Systematic review of randomized controlled trials with meta-analysis |
2 | Selected randomized clinical trials and systematic reviews of studies of any design, excluding RCTs, with meta-analysis |
3 | Non-randomized comparative studies, including cohort studies |
4 | Non-comparative studies, case reports or case series, case-control studies |
5 | Only justification of the mechanism of action of the intervention (preclinical studies) or expert opinion is available |
Table 3. Grade of Recommendation (GoR) scale for prevention, diagnostic, treatment, and rehabilitation methods (preventive, diagnostic, therapeutic, and rehabilitative interventions)
GoR | Definition |
|---|---|
A | Strong recommendation (all considered efficacy criteria (outcomes) are important, all studies are of high or acceptable methodological quality, and their conclusions on the outcomes of interest are consistent) |
B | Conditional recommendation (not all considered efficacy criteria (outcomes) are important, not all studies are of high or acceptable methodological quality, and/or their conclusions on the outcomes of interest are inconsistent) |
C | Weak recommendation (lack of adequate quality evidence (all considered efficacy criteria (outcomes) are unimportant, all studies are of low methodological quality, and their conclusions on the outcomes of interest are inconsistent) |
Procedure for updating clinical guidelines.
The clinical guidelines update mechanism provides for their systematic revision—at least once every three years, as well as upon the emergence of new evidence-based data regarding the diagnosis, treatment, prevention, and rehabilitation of specific diseases, or the presence of justified additions/comments to previously approved clinical guidelines, but no more frequently than once every 6 months.
Appendix A3. Reference Materials
These clinical guidelines were developed taking into account the following regulatory legal documents:
Procedure for the provision of medical care in the profile of «dermatovenereology», approved by Order of the Ministry of Health of the Russian Federation No. 924n dated November 15, 2012.
Appendix B. Physician Action Algorithms

Appendix C. Patient Information
Patients with perioral dermatitis are indicated for discontinuation of corticosteroids or D07 Corticosteroids used in dermatology and occlusive cosmetic products
Patients with perioral dermatitis are indicated for gentle skincare using specialized products
Patients are advised against natural ultraviolet irradiation, as well as visiting tanning salons. The use of a sunscreen product adapted for oily and problematic skin is recommended.
Appendix G. Assessment Scales, Questionnaires, and Other Evaluation Tools
Appendix G1. Patch skin test reaction scale
The PODSI index is designed to assess the severity of perioral dermatitis.
Original title: PeriOral Dermatitis Severity Index.
Source (official developer website, validation publication):
Wollenberg A, Oppel T. Scoring of skin lesions with the perioral dermatitis severity index (PODSI). Acta Derm Venereol. 2006;86(3):251-2.
Type (underline):
- assessment scale
- index
- questionnaire
- other (specify):
Purpose: assessment of the overall severity of perioral dermatitis
Content (template):
Calculation of the PODSI index
Scoring of skin eruptions (PODSI) | |||
|---|---|---|---|
Features | Grade I (1 point) | Grade II (2 points) | Grade III (3 points) |
Erythema | Pale pink, barely noticeable | Moderate, reddish, patchy | Pronounced, dark red, diffuse, coalescing |
Papules | Single, small, skin-colored | Few, moderately pronounced, disseminated | Numerous, pronounced, erythematous, prone to coalescence |
Desquamation | Mild, barely noticeable | Moderate | Moderate |
Key (interpretation): The PODSI index value is the sum of scores for the severity of erythema, papules, and desquamation, according to the presented eruption characteristic options for each severity degree, where «0» means «absence of the sign», 1, 2, 3 points – the severity degree of the sign, and intermediate degrees of 0.5; 1.5, and 2.5 may also be used.
Mild perioral dermatitis corresponds to PODSI index values of 0.5–2.5, moderate severity to 3.0–5.5, and severe form to 6.0–9.0 [18, 23].