In fact there are many causes that can cause bad breath, including diseases of the mouth, nasopharynx and other organs. If the bad breath is caused by damp heat in the stomach, it is more effective to take Patchouli Stomach Clearing Pill, which usually works in about 10 days. Huo Xiang Qing Stomach Pill is a proprietary Chinese medicine, mainly composed of herbs such as patchouli, licorice and gypsum, which has the effect of clearing heat and resolving dampness. It is clinically proven that after using this medicine it is more effective for bad breath caused by damp heat in the spleen and stomach, and it usually works in about 10 days. However, it should be noted that some patients’ bad breath is physiological, caused by the consumption of onions, garlic and other smelly foods, or due to inattention to oral hygiene, food residues fermented in the teeth, etc.. The bad breath will be improved by developing good oral hygiene habits, adjusting the diet and replacing the toothbrush in time. Some are also pathological factors leading to bad breath, common causes are oral diseases, nasopharyngeal diseases, as well as indigestion, chronic gastritis, etc., need to be clearly diagnosed in a regular hospital, and treatment for the cause. In conclusion, it is best to go through a professional doctor’s interview before using Huo Xiang Qing Wei Wan for bad breath, in order to prevent improper use of medication and affect the course of the disease.