In 2020, higher rates of acne mechanica were reported due to the habitual use of face masks during the COVID-19 pandemic, colloquially known as "maskne." A change in the facial microbiome, increased local temperature with subsequent increase in sweating, and friction are all thought to be important in its pathogenesis.
Acne mechanica presents similarly to acne vulgaris. Acneiform papules and pustules may eventuate into nodules or cysts. Comedones may also be seen.
L70.8 – Other acne
13101006 – Acne mechanica
Differential Diagnosis & Pitfalls