In Traditional Chinese Medicine (TCM), teeth grinding (known as bruxism or terms like Kaishi and Geshi) is viewed as a sign of internal disharmony, tension in the sinews, or spirit (Shen) restlessness rather than just a mechanical dental issue. Core TCM Root Causes & Patterns - Liver Qi Stagnation (Stress and Emotional Tension): The Liver governs the smooth flow of vital energy (Qi). Chronic stress, frustration, or pent-up emotions can cause Liver Qi to stagnate and turn into internal tension or heat, which spasms the facial muscles and leads to nighttime clenching or grinding. - Stomach Heat / Fire: The upper gums and surrounding jaw structures connect to the Foot Yangming Stomach Meridian. Excess heat or fire in the stomach—often triggered by spicy, rich foods, alcohol, or constipation—rises upward during sleep to agitate the nervous system and trigger grinding. - Kidney Deficiency (Jing/Essence Depletion): In TCM, "teeth are the surplus of the bones," and the Kidneys govern both bones and teeth. Overwork, aging, or chronic illness deplete Kidney Essence (Jing), leaving the jaw joint and teeth poorly nourished, weak, and prone to involuntary movement or damage. - Qi and Blood Stagnation in the Head and Face: Localized blockages in the meridians running through the jaw, face, and neck lead to stiffness, restricted circulation, and hypertonicity in the masseter and temporomandibular muscles. Restlessness of the Shen (Spirit): Emotional exhaustion, overactive thinking, or poor sleep quality disturb the heart and spirit (Shen), keeping the body in a hyper-alert state even during deep sleep.