Breathing in and out of the air, the breath exhaled by the person has no special smell. Abnormal breath often comes from food, smokers, drinking alcohol are, etc. If exhaled foul-smelling breath or have some kind of special breath, it is significant when seen clinically in oral, respiratory, gastrointestinal and some visceral diseases. Another kind of breath abnormality is the abnormal frequency and rhythm of breathing. Abnormal breath from the oral cavity and nasal cavity can often be examined directly. Abnormal breath from the gastrointestinal tract often has clinical signs of indigestion. Abnormal breath from the bronchus and lungs is often accompanied by cough, large amount of foul sputum, chills, fever, chest pain on the affected side, shortness of breath, excessive sweating, general weakness, lack of appetite, etc. So, how can abnormal breath be prevented? The following are the preventive measures for breath abnormalities. 1.Remove the cause of the disease. 1, to develop good habits, do not smoke. 2, maintain a good state of mind and stable emotions. The control of breath is caused by the confrontation of the muscle contraction force of each ministry. If only one aspect is emphasized and another is neglected, good breath control will not be formed. Therefore, to achieve the ideal breath control, must be the organic combination of the abdominal muscles and diaphragm.