Early onset of bad breath can be temporarily relieved by brushing or gargling mouthwash, and then go to the hospital to find out the cause of the disease, periodontal treatment or medication for the cause of periodontal treatment. 1. Symptomatic treatment: Early onset of bad breath can be cleaned by effective brushing of teeth and oral mucosa, or use mouthwash to temporarily relieve bad breath. 2. Treatment: If bad breath is caused by caries or periodontitis, fillings or periodontal treatment is needed to eliminate periodontal inflammation. If it is digestive diseases such as gastric ulcer, esophagitis, need to use drugs such as omeprazole, if it is a respiratory disease such as bronchitis, need to use bromhexine and other drugs to treat. It is recommended to go to the hospital first to check the cause of the odor, timely treatment, so as not to affect the work and life, the drugs need to comply with the doctor’s instructions for the rational application.