There is no odor in the normal mouth. If the breath smells like garlic, there may be secretions in the respiratory tract or abnormal odor from vomit and excrement in the intestines, which is likely to be a weakened gastrointestinal function. Normally, you need to pay more attention to eat a light diet and eat more vitamin-rich vegetables and fruits. If you smell garlic when you exhale, you may have inflammation in the nasal cavity or secretions that cannot be discharged in time, or your respiratory tract is infected. If this happens, you need to rinse the inside of the nose with light salt water, so as to remove foreign substances in the nose and mouth and allow them to be discharged, and you need to drink more warm water and pay attention to oral hygiene at the same time. If suffering from periodontal disease should be treated promptly, no smoking, alcohol, or spicy and irritating foods such as onions, garlic, leeks, etc.