The Shar-Pei is a type of dog breed known for its deep wrinkles and blue-black tongue. Although the Shar-Pei has been identified as a basal breed that predates the emergence of the modern breeds in the 19th century, the American Kennel Club recognized it as their 134th breed only in 1992. Some people may experience a sensitivity to the harshness of the coat of either length. 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.