Mask mouth – identifying and treating the symptoms
(https://dentistry.co.uk/2021/02/11/mask-mouth-identifying-symptoms/)

"A new condition known as ‘mask mouth’, first termed by dentists in the US, highlighted the possible side effects of wearing a mask on people’s oral health."

"the late eminent American periodontist, Professor Perry Ratcliff, claimed that high concentrations of VSCs are also highly toxic to the tissues in the mouth and alter the epithelial barrier, allowing bacterial toxins to penetrate into the deeper tissue, starting the inflammatory action that can lead on to more severe problems, such as gingivitis and periodontitis."

Dentists say 'mask mouth' can cause serious health complications, including strokes- 

_{By Andrew Mark Miller - August 7, 2020}

https://www.washingtonexaminer.com/news/mask-mouth-dentists-warn-prolonged-use-of-masks-leading-to-poor-oral-hygiene

"They said dental problems associated with "mask mouth," including gum disease, could lead to serious complications.

“Gum disease — or periodontal disease — will eventually lead to strokes and an increased risk of heart attacks,” Marc Sclafani, a dentist and co-founder of One Manhattan Dental, told the New York Post about “mask mouth,” which is increasingly causing inflammation and gum disease among patients. "

“We’re seeing inflammation in people’s gums that have been healthy forever, and cavities in people who have never had them before,” Ramondi said. “About 50% of our patients are being impacted by this, [so] we decided to name it ‘mask mouth’ — after ‘meth mouth.’”