Severe contact urticaria, mimicking allergic contact dermatitis, due to a surgical mask worn during the COVID-19 pandemic

Differential diagnosis of contact dermatitis: A practical-approach review by the EADV Task Force on contact dermatitis

The diagnosis of eczema ('dermatitis') is mostly clinical and depends on the clinical history and exploratory objective findings (primary lesions, patterns). Contact dermatitis remains as an important condition in the group of eczematous disorders, with important socioeconomic and occupational relevance. Although irritant and allergic contact dermatitis have a different pathogenesis, both are characterized by a rather typical morphology, are triggered by external factors and tend to occur primarily in the area of contact with the exogenous agent. In addition, allergic and irritant dermatitis may also co-exist. The importance of diagnosing contact dermatitis, especially when allergic in nature, is both due to the possibility of avoiding the trigger, and due to its role in aggravating other skin conditions. Nevertheless, the heterogeneity of clinical presentations in daily practice may pose an important challenge for the suspicion and correct diagnosis of contact dermatitis. Furthermore, other conditions, with different pathogenesis and treatment, may clinically simulate contact dermatitis. The Task Force aims to conduct a review of the unifying clinical features of contact dermatitis and characterize its main clinical phenotypes, and its simulators, in order to contribute to an early suspicion or recognition of contact dermatitis and enable a correct differential diagnosis.

Myricetin alleviated immunologic contact urticaria and mast cell degranulation via the PI3K/Akt/NF-κB pathway

Immunologic contact urticaria (ICU) is characterized by the wheal and flare reaction from direct contact with a chemical or protein agent, which involves a type I hypersensitivity mediated by allergen-specific immunoglobulin E (sIgE). Myricetin (Myr), a bioactive flavonoid, exhibits antiinflammatory activities. Our results showed that treatment with Myr could alleviate ICU symptoms, including a decrease in the number of wheals and scratching, and inhibit ear swelling in the IgE/DNFB-induced mice. The serum level of IgE, histamine, interleukin (IL)-4, TNF-α, and MCP-1 were reduced in Myr-treated mice. Myr also attenuated mast cells (MCs) degranulation and H-PGDS, TSLP, IL-33, PI3K, Akt, and NF-κB mRNA levels in ICU model. The IgE-mediated anaphylaxis mouse models demonstrated anti-allergic effects of Myr. In vitro analysis showed that Myr reduced IgE-induced calcium (Ca²⁺ ) influx, suppressed degranulation, and chemokine release in LAD2 cells (human primary mast cells). Myr can significantly inhibited PLCγ1, Akt, NF-κB, and p38 phosphorylation. In conclusion, the study demonstrated that Myr alleviate ICU symptoms and inhibit mast cell activation via PI3K/Akt/NF-κB signal pathway.

Maskne-Dermatosis of a Pandemic. A Survey on the Impact of PPE on Facial Skin Among HCW and N-HCW in Poland

Introduction

During the SARS-CoV-2 pandemic, personal protective equipment (PPE) became the new social norm for preventing COVID-19, but with an impact on the skin barrier. This study aimed to analyze the factors influencing PPE wearing, following hygiene rules, and effect on facial skin, including onset or exacerbation of dermatoses among healthcare workers (HCW) and non-healthcare workers (N-HCW).

Methods

In 2020, an original survey was carried out among 300 N-HCW and 60 HCW with 60 questions about using PPE and skin lesions experienced before and during the pandemic. Cross-sectional statistical analysis was completed to assess the interplay between environmental factors and maskne occurrence.

Results

The N-HCW group included 74% females and 26% males with an average age 24.67 ± 0.74. Among HCW respondents 91.7% were women and 8.3% were men, with an average age of 30.07 ± 0.36. All participants used PPE. Volunteers for N-HCW mainly chose a disposable (53.3%) and reusable masks (37.3%), while HCW preferred surgical (66.7%) and FFP2/FFP3/N95 masks (30%) and almost never used reusable masks (3.3%). HCW mainly spent 5–8 h with PPE, and N-HCW spent 1–4 h with PPE/day. Respondents with dermatological problems before the pandemic were more aware of the maskne and paid more attention to hygiene with PPE. Significantly, HCW experienced more severe facial skin lesions than N-HCW (p < 0.0001). There was statistical significance in following the basic hygienic rules of wearing PPE between both groups, where HCW practiced them more.

Conclusions

Maskne is a current and urgent problem to be cured. HCW should receive help if they develop maskne, such as limited time spent in PPE and treatment of the results of wearing it, as it is the main trigger of developing maskne. In addition, education about the correct use and choice of PPE should be improved.

Supplementary Information

The online version contains supplementary material available at 10.1007/s13555-022-00796-w.

Contact dermatitis due to personal protective equipment use and hygiene practices during the COVID-19 pandemic: A systematic review of case reports

BACKGROUND

Prolonged use of personal protective equipment (PPE) may lead to contact dermatitis during the coronavirus disease 19 (COVID-19) pandemic. This paper aims to identify the causative factors of contact dermatitis from PPE and hygiene practices.

METHODS

The search was conducted adhering to PRISMA 2020 guidelines. A Delphi process was employed to ensure that the aims of this study were met. PubMed and Web of Science databases were systematically searched through September 12, 2021, using search terms: Contact dermatitis, case report, covid-19. The findings were tabulated as author/year, gender, age, presentation, cause, dermatological diagnosis, testing modality, provided treatment, symptom resolution (time in days), prognosis, and follow-up.

RESULTS

The mean age of all individuals was 29.75 years, with 75% females. All cases presented with erythema, with 62.5% reporting pruritus and 37.5% reporting burning facial symptoms. Surgical masks and hand-hygiene products (37.5%) were the most commonly reported causative agent with 25% due to KN95/FFP type 2 use. Allergic contact dermatitis (50%) and irritant contact dermatitis (25%) were common diagnoses. Treatments included creams, emollients, and desloratadine, with restriction of irritant-causing factors. The prognosis was generally good among the cases, with 62.5% presenting complete resolution within a week and 12.5% showing moderate improvement at the fourth month after discontinuing use.

CONCLUSION

This study finds pertinent links between PPE use and contact dermatitis during the COVID-19 pandemic. While many cases are bound to go underreported in literature, well-designed, large-scale studies in the future may help promote these associations in a more comprehensive manner.