What causes a thick and white tongue coating?

Feb 25, 2025 Source: Cainiu Health
Dr. Shen Yonghua
Introduction
Frequently consuming greasy, spicy foods or overeating can easily lead to indigestion and cause the tongue coating to become thick and white. Adjusting your diet by reducing intake of greasy and spicy foods, and eating more light, easily digestible foods, such as vegetables and fruits, can help. Poor oral hygiene in daily life can result in bacterial growth and food residue accumulating on the surface of the tongue, forming a thick, white tongue coating.

Thick and white tongue coating may be caused by dietary habits, poor oral hygiene, environmental factors, gastric ulcers, hyperthyroidism, and other conditions. Improvement can be made according to the specific situation. It is recommended to visit a hospital promptly and receive treatment under the guidance of a physician.

1. Dietary habits: Regular consumption of greasy or spicy foods or overeating can easily lead to indigestion, causing thick and white tongue coating. Adjust your diet, reduce intake of greasy and spicy foods, and consume more light, easily digestible foods such as vegetables and fruits.

2. Poor oral hygiene: Neglecting oral cleanliness in daily life may cause bacteria and food residues to accumulate on the tongue's surface, forming thick and white tongue coating. It is recommended to brush teeth regularly, use dental floss to clean between teeth, and clean the tongue periodically. Maintaining good oral hygiene can help reduce the formation of tongue coating.

3. Environmental factors: A damp living environment may affect bodily metabolism and circulation, potentially leading to thick and white tongue coating. Make efforts to improve the living environment and keep indoor areas dry and well-ventilated.

4. Gastric ulcer: This condition may be related to infection, causing upward movement of gastric gases, internal formation of dampness and heat, which then rises to the tongue surface, resulting in thick and whitish tongue coating. It is recommended to take medications such as esomeprazole magnesium enteric-coated tablets, rabeprazole sodium enteric-coated tablets, and lansoprazole tablets under a doctor's guidance for improvement.

5. Hyperthyroidism: This condition is usually caused by excessive secretion of thyroid hormones. Endocrine disorders lead to metabolic abnormalities in the body, affecting the oral environment and causing thick and whitish tongue coating. Patients can take medications such as methimazole tablets, propylthiouracil tablets, and carbimazole tablets under a doctor's guidance to alleviate symptoms.

In daily life, maintain a light diet and avoid consuming spicy and irritating foods such as garlic, spicy hotpot, and mustard. Also, ensure adequate rest and avoid excessive fatigue to prevent adverse effects on overall health.