The bad breath can be treated by general treatment such as not staying up late, brushing teeth diligently, etc. If there are oral diseases, oral treatment is needed, if there are gastrointestinal diseases, medication should be carried out. 1. When you stay up late with heavy breath and bad breath, you need to change your routine, try to work and rest regularly, brush your teeth diligently, eat a light diet, etc., which can reduce the phenomenon of bad breath. 2. Oral diseases cause bad breath, such as dental caries can cause bad breath phenomenon, the need for timely fillings, root canal treatment. If there is inflammation of the gums, you need to be scaled. 3. If there are gastrointestinal diseases such as Helicobacter pylori infection, the phenomenon of heavy breath can occur, and can be treated with medication, including omeprazole, bismuth pectin, clarithromycin, metronidazole and so on. If the phenomenon of heavy breath, go to the hospital in time for examination, the use of the above drugs need to follow the doctor’s advice.