What is CASC? The Certified Administrator Surgery Center (CASC) credential is a distinction earned by those in the ASC industry with a comprehensive understanding of the knowledge and skills that the role of an ASC administrator requires. The Board of Ambulatory Surgery Certification (BASC) is the organization that administers the CASC exam.
1 Tender, red splits or cracks at the corner of your mouth (angular cheilitis), which can be caused by infection, a diet too low in vitamins, and over-closure of the mouth in someone who has been without teeth or dentures for some time.  Chapped lips, which may be caused by dry, windy, cold, or very hot weather.
The Dry Mouth Feeling. Lack of saliva makes the skin in and around your mouth dry and tight. Your lips may become cracked. Sores might form at the corners of your mouth. Your tongue may feel rough and dry. It may also be tough to swallow and talk.