Mewing is the act of maintaining proper tongue position by flattening the tongue against the roof of the mouth. This technique, introduced by British orthodontist Dr. John Mew, aims to help improve facial structure by remodeling the maxilla. As strange and unconventional as this may sound, it is actually nothing new. For years, doctors have been recommending tongue alignment exercises to treat patients. The mewing results are particularly interesting because a well-developed maxilla has a positive effect on facial appearance and breathing ability.