TV dermatologist Dr Pimple Popper, aka Sandra Lee, is world-renowned for being the expert in, well, popping zits, as well as just taking good care of our skin in general. And while we thought we left acne behind in our teenage years, now maskne – acne caused by irritation from friction on the skin from fabric – is on the rise, due to the coronavirus pandemic forcing us to wear masks in an increasing number of work settings and public spaces.