Enlargement of preexisting superficial temporal artery pseudo-aneurysm co-incidental to mask wearing during the Covid-19 pandemic

•The superficial temporal artery pseudo-aneurysm during the COVID-19 pandemic.•An enlargement of the preexisting aneurysm had taken pace potentially due to irritation from the wearing of the mask.•Surgical excision of the aneurysm and reconstruction of the STA using STA-STA bypass. The superficial temporal artery (STA) pseudo-aneurysm is usually associated with trauma. We report a unique case of an STA pseudo-aneurysm that developed due to mask wearing during the Covid-19 pandemic. A 70-year-old female presented with a 3-month history of a rapidly growing pseudo-aneurysm of the right STA. Over the past 3 months the patient had been wearing a mask for the prevention of Covid-19. The STA aneurysm was located exactly at a pressure point created by the rubber mask. Therefore, we assumed that an enlargement of the preexisting aneurysm had taken pace due to irritation from the elastic band of the mask. Surgical excision of the aneurysm and reconstruction of the STA using STA-STA bypass were performed. To our knowledge, we here report the first case of an STA pseudo-aneurysm that was potentially affected indirectly by the Covid-19 pandemic. Clinicians should be cautious about the preexisting medical condition that is potentially worsened by mask band compression.