In clinical practice, when taking a medical history, patients with bitter mouth symptoms are often encountered. There are many reasons for the appearance of bitter mouth, and the time of appearance of bitter mouth is all different. Clarify the causes and treat the symptoms. There are many causes of bitter mouth, among which the main causes include: 1. Oral diseases, such as tooth decay, gingivitis, periodontal abscess and inflammation of salivary glands, may cause the symptoms of bitter mouth. When oral diseases cause bitter mouth, pay attention to oral hygiene and control the inflammation in order to treat bitter mouth. 2, gastrointestinal diseases, such as chronic gastritis, gastric sinusitis, etc. These diseases can cause excessive stomach acid and symptoms of acid reflux and bitter mouth. In this case, you should take oral medication for stomach diseases to enhance gastric power, relieve the symptoms of acid reflux and treat bitter mouth. Usually, you should also pay attention to the regular diet, do not overeat and pay attention to gastrointestinal protection. 3.Mouth bitterness is caused by excessive liver fire from the perspective of traditional Chinese medicine, and liver qi invades bile qi, causing bile qi to be invaded and forming the symptoms of mouth bitterness. Drink more chrysanthemum tea to calm liver Yang, drink more water and pay attention to work and rest and emotional regulation. In oral diseases and those with strong liver fire, mouth bitterness appears almost all day long, and some may have severe mouth bitterness in the morning. In gastrointestinal diseases, bitterness usually appears after eating and drinking. When the symptoms of bitter mouth appear, you should go to the hospital for examination and treatment according to the cause.