Mouth breathing may be caused by adenoiditis, nasal polyps, etc. It can usually be corrected by antimicrobial drugs such as ceftriaxone and ceftazidime, and surgical treatment. 1. Adenoiditis: Usually the symptom of mouth breathing may be caused by insufficient air entering through the nasal cavity, such as adenoiditis caused by glandular hypertrophy. Treatment at this time is mainly to control the infection, can be used under the guidance of the doctor ceftriaxone, ceftazidime and other antibacterial drugs. Generally after the inflammation is controlled, the glandular hypertrophy will disappear, which will improve the symptoms of mouth breathing. 2. Nasal polyps: the symptoms of mouth breathing may also be caused by nasal polyps and other factors, at this time the patient can go to the hospital through surgical removal of nasal polyps to treat and relieve the symptoms of mouth breathing. Mouth breathing may also be caused by other reasons, such as rhinitis, enlarged tonsils, etc. Patients who appear to breathe through their mouths should actively seek medical attention and be treated under the guidance of a professional doctor. However, medication should not be used blindly to avoid adverse consequences.