1, periodontal inflammation, gingival exudation, oral erosion, food residue in the gingival margin of dental caries, suppurative tonsillitis, pus accumulation in the tonsil recess, etc., can all have a bad smell in exhalation.

☆ Health tip: People with dry mouth and bad breath are prone to grow stones in their teeth.

2. When atrophic rhinitis, paranasal sinusitis, nasal tumors or foreign bodies exist in the nasal cavity, there are more pus necrotic tissues and a large number of bacteria in it due to local inflammation and increased secretions. When breathing through the nose, unpleasant nasal breath will be emitted in the nasal cavity.

3. Patients with lung abscess and bronchiectasis complicated with infection not only spit out a lot of purulent sputum, but also have purulent odor in exhaled gas. When indigestion caused by overeating or gastritis caused by unclean diet, food is fermented in the stomach and erupts, it may have a sour smell.

4. The food residues embedded in the teeth or dental caries will rot and ferment, and there may be unpleasant bad breath.

★ Introduce several methods to get rid of bad breath.

First, use breath fresheners.

Breath freshener can effectively remove the bad smell caused by food metabolites in the mouth, the bad smell caused by mild sinusitis and the bad breath caused by smoking in time. You can drink a few mouthfuls of water first, spray breath freshener and then close your mouth for a few seconds, which can keep your mouth fresh for hours.

Second, drink lemonade.

Drinking clear water can keep the mouth moist. Adding a slice of lemon to the water can stimulate saliva secretion and reduce bad breath caused by anaerobic bacteria caused by stuffy nose, dry mouth or residual food in the mouth.

Third, eat more fruits and vegetables.

Vegetables contain a lot of fiber, which can help digestion and prevent constipation. Vitamins contained in vegetables and fruits can also help restore the health of gums, prevent gums from bleeding, and eliminate excessive mucosal secretions and wastes in the mouth.

Fourth, brush your teeth thoroughly in the morning and evening. Electric toothbrushes are more effective than ordinary toothbrushes.

In addition, dental floss once a day to completely remove the tartar hidden in the teeth.