Because skin findings may sometimes be a sign of internal medical problems, we consistently pay close attention to a patient’s complete medical history and are vigilant for signs of internal diseases manifested as skin problems. Both Drs. Frederickson and Dalton completed an internship in internal medicine prior to completing a dermatology training program (residency). Dr. Frederickson and Dr. Dalton specialize in all dermatologic disorders. The following is a list of commonly treated conditions.