First developed by British orthodontist John Mew and made famous by his son via social media, mewing is a treatment you can do at home that is supposed to improve the appearance of your jaw.

PA Media Dr Mew's methods are popular on social media sites Qualified dentist Aliyah Janmohamed, who worked with Dr Mew at his clinic in Purley, south London, between June 2017 and January 2019 ...