Tongue odor should first clarify the cause of the disease and then take appropriate measures, tongue odor may be caused by disease causes of bad breath, such as gingivitis, gastritis, etc., but also may be caused by physiological reasons. 1. Physiological reasons: unclean brushing of teeth leads to excessive accumulation of food debris, the tongue will be thicker, and there may be yellowing symptoms. Pay attention to the correct way of brushing, brushing the teeth to pay attention to clean in place, the tongue should also gently brush, clean the tongue, pay attention to a light diet, do not eat spicy and stimulating food, usually will soon be better. 2. Gingivitis: when brushing teeth or biting hard objects will be accompanied by symptoms of bleeding gums, in addition to bad breath, will be accompanied by itching, swelling and so on. Usually brush your teeth carefully, if the symptoms can not be relieved, you can carry out supragingival cleaning, subgingival scraping to remove tartar, to alleviate the uncomfortable symptoms. 3. Gastritis: when suffering from gastritis, when the odor of inflammatory secretion is discharged in the reverse direction, it will lead to oral odor, thus feeling the tongue stinks. You can follow the doctor’s instructions to use drugs to inhibit the secretion of gastric acid, such as cimetidine, famotidine, etc., to develop good eating habits, avoid spicy and stimulating food. After eliminating the physiological reasons for the long term odor of the tongue, you should consult a doctor to take relevant treatments in time to avoid delaying your condition.