What does it mean when the tongue coating is thick and white, accompanied by bad breath?

Thick white tongue coating accompanied by bad breath may be caused by various factors. 1. Poor eating habits are common causes. Long-term consumption of greasy, spicy, or cold foods may increase the burden on the gastrointestinal tract, leading to indigestion, and subsequently causing thick white tongue coating and bad breath. 2. Spleen and stomach deficiency is another significant factor. This may result from unhealthy eating habits, excessive fatigue, aging, or physical weakness. Spleen and stomach deficiency can impair normal digestive function, leading to symptoms such as indigestion, white and greasy tongue coating, and bad breath. 3. Yin deficiency with internal heat or phlegm-dampness conditions may also contribute to thick white tongue coating and bad breath. To address these issues, it is recommended to improve dietary habits by avoiding excessive intake of spicy or irritating foods, maintaining regular meals, and moderately consuming foods that strengthen the spleen and resolve dampness, such as Chinese yam and coix seed. Additionally, maintaining good oral hygiene, ensuring adequate sleep, and avoiding excessive fatigue are advised. If symptoms persist, timely medical consultation is recommended for accurate diagnosis and treatment.