The Neuroscience of Lip Biting: Why We Do It and How to Stop

Why Do You Bite Your Lip? A Neurologist Explains the Science Behind This Common Habit Millions struggle with unconscious habits like lip biting. Dr. Bing, MD MPH, a neurologist, sheds light on this common behavior, explaining its neurological basis. Lip biting, according to Dr. Bing, falls under Body-Focused Repetitive Behaviors (BFRBs), often stemming from underlying stress or discomfort. "It's not just a quirk; there's real neuroscience behind it," he explains in his TikTok video. The act triggers the brain's reward system, releasing dopamine, which reinforces the habit. This involves a complex interplay between the prefrontal cortex and basal ganglia. While often harmless, Dr. Bing advises seeking help if lip biting interferes with daily life. Fortunately, effective therapy programs are available to help break this cycle.