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.
9. Licking or biting the lips can cause the corners of the mouth to crack. Some people who wear dentures also find there are problems with the fit and cracks develop. If the cracks in the corners of your mouth do not go away in a few days, speak with your doctor. The condition can be uncomfortable and make you self-conscious of your appearance, so the sooner it clears up the better.