There are many clinical causes of bitterness in the mouth, and the treatment methods are different, so we need to carry out targeted treatment according to the specific causes, such as daily life conditioning, medication, periodontal treatment, etc. 1.Daily life conditioning: mental stress, irregular life, smoking, alcoholism, etc. lead to bitterness in the mouth, and need to improve the causes. If you keep a regular routine, go to bed early and wake up early, drink more water, drink chrysanthemum tea, honeysuckle tea, etc., and ensure appropriate exercise, avoid smoking and drinking alcohol, most of the bitterness of the mouth can gradually reduce to disappear; 2.Medication: If the bitterness of the mouth is accompanied by gastrointestinal discomfort, irritability, depression and other symptoms, you can promptly consult the Chinese medicine department and take corresponding Chinese medicine under the guidance of the doctor, such as 3, periodontal treatment: If there is more calculus, soft scale, plaque, resulting in gingivitis, periodontitis, mouth bitterness, bad breath, etc., you need to go to the hospital stomatology department for periodontal treatment, including ultrasonic cleaning, subgingival scraping, etc.; 4, pay attention to oral hygiene: mouth bitterness caused by poor oral hygiene, in addition to periodontal treatment, usually should also learn to Brush your teeth correctly, and rinse your mouth after meals. When brushing, pay attention to all teeth should be cleaned in place, choose a toothbrush and toothpaste suitable for you.