Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Vermillion border
Introduction
Overview
The normally sharp demarcation between the red of the lip and the adjacent normal skin. The vermillion border is important in dentistry and oral pathology because it is used as a marker to detect pathology, such as in actinic cheilitis. It represents the change in epidermis from highly keratinized external skin to less keratinized internal skin.