Bad breath is often caused by poor hygiene habits, eating smelly food or disease and other factors, speak and breathe from the mouth odor, may affect the normal social interaction of people, can be improved by maintaining oral hygiene, changing dietary habits and active treatment of the original disease: 1, maintain oral hygiene: morning and evening brush your teeth, brush your teeth also need to pay attention to clean tongue, rinse your mouth after meals, you can use light salt water or Mouthwash, etc., you can also use dental floss to assist in cleaning, to avoid food residues embedded in the teeth for a long time, by oral bacteria fermentation, decomposition and oral odor; 2, change the diet: the diet can be reduced garlic, leeks, stinky tofu and other smelly food, which can alleviate the temporary bad breath caused by such food. Long-term smoking, drinking alcohol is easy to residual taste in the mouth, should reduce the stimulation of tobacco and alcohol to avoid breeding oral odor, but also by chewing tea, licorice, lemon slices, chewing gum and other auxiliary fresh breath to relieve bad breath; 3, treatment of the original disease: if the above ways to remove bad breath is not obvious, or oral discomfort symptoms such as toothache, need to consider the disease factors that cause bad breath, it is recommended to seek medical attention. Commonly, periodontitis, gingivitis, periodontal abscess, tonsillitis, tonsil calculus and other diseases can cause bad breath, can be treated with medication under the guidance of a doctor, or remove plaque, calculus, etc. through scaling, scraping, or oral antibiotics such as amoxicillin treatment. In addition, gastrointestinal diseases can also cause bad breath, such as dyspepsia or intestinal obstruction, food accumulation can not be smoothly digested, corruption produces odor, there may be loss of appetite, abdominal distension, abdominal pain, reduced number of bowel movements and even vomiting and other symptoms, need to be treated for the original disease, can take probiotics and other drugs under the guidance of doctors to relieve indigestion, intestinal obstruction patients need to fasting water, gastrointestinal decompression, and diagnosed by doctors to decide Whether surgery is needed.