The first thing to do is to find out the cause of the bitterness in the mouth, the common causes are: 1. Acute and chronic hepatitis, cholecystitis, take Six Flavoured Five Spirit Tablets, Anti-inflammatory and Choleric Tablets, etc. 2. Wind-heat and cold, take Pudilan Anti-inflammatory Oral Liquid, Niuhuang Detoxification Pill, etc. 3. Damp-heat of liver and gall bladder, bitterness and stickiness in the mouth, take Gentian and Liver Pill, Danjuania and Free and Easy Pill, etc. 4. Damp-heat of spleen and stomach, not thinking about eating, bitterness in the mouth, distension in the stomach and abdomen, take Ganlu Disinfectant Pill, Stomach Clearing Pill, etc. 5. 5.各種腫瘍で.口の中が苦く味気ない場合は.対症療法が必要です。