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.
10 2 1 1 2 4. If you have a sore in the corner of your mouth, usually in both sides, you may have Angular Chelitis. This condition is not fatal, nor is it contagious, however the legions in the corner of the mouth can be very uncomfortable. The lips split and ulcerate, often if feels like paper cuts at the corners of the mouth. The legions get crusty and have a whitish hue. Often sufferers report it is brought on during a cold spell, or during the onset of winter, indicating a weakening of the immune system.