What causes a thick white coating on the tongue?

Possible causes of thick white coating on the tongue include the following: 1. Improper diet: Long-term consumption of greasy, spicy, or irritating foods may lead to excessive stomach heat, resulting in symptoms such as red and swollen gums and thick tongue coating. 2. Emotional imbalance: Prolonged stress, anxiety, or other emotional disturbances may cause liver qi stagnation, further manifesting as acne on the cheeks and a thick white tongue coating. 3. Digestive system issues: Conditions such as indigestion or constipation can disrupt spleen and stomach function, impair gastrointestinal fluid production, and increase internal dampness, making a thick white tongue coating more likely. 4. Traditional Chinese Medicine (TCM) perspective: In TCM, a thick white tongue coating may be associated with spleen and stomach deficiency, internal accumulation of phlegm-dampness, or food stagnation, requiring pattern differentiation and individualized treatment. It is recommended to drink adequate water, consume more fresh fruits, vegetables, and dietary fiber, and maintain a healthy lifestyle. If symptoms persist, seek medical advice promptly.