Chinese medicine believes that orange tongue coating may be caused by dampness-heat in the liver and gallbladder (dampness-heat evil qi accumulates in the liver and gallbladder) or diet. 1. Damp-heat of the liver and gallbladder: Generally, it is caused by external damp-heat or dietary fat, sweet and thick flavors, which leads to internal damp-heat and blocks the excretion of the liver and gallbladder. The main manifestations are pain and distension of the ribs and wounds, bitter taste in the mouth, anorexia of greasy food, acid reflux, red and yellow urine, yellow skin, yellow eyes, etc. The condition can cause the tongue to become coated. The condition can lead to orange-colored tongue coating. 2. Dietary reasons: If you eat yellow food or drugs, such as carrots, persimmons, oranges, mangoes, pumpkins, etc., the color of the food stained on the tongue and lead to orange tongue coating. Generally, the color of the tongue can be restored to normal after adjusting the diet or stopping the medication. For patients with orange-colored tongue, it is recommended to go to regular hospitals for treatment under the guidance of professional physicians.