What’s wrong with this woman’s neck?

Who knows, but it’s got nothing to do with the product this billboard is advertising: Nuan Pei’er, a brand of Korean thermal underwear. The woman with the neck problem is TV soap opera actress Yan Danchen (My Mother, My Father). The underwear is made from a fabric called ‘nuan si er’ which the ad calls the ‘soft gold of the 21st century’.