 This is a mild, short-lived rash that can develop on skin that has been in contact with the coat, most commonly on the forearms.The traditional Shar-Pei that is most popular in China is more faithful to the history of the breed (taller, less wrinkly, a flatter mouth and nose, horse-coated).As puppies, they have many wrinkles and as they get older, they have fewer wrinkles.