
What causes dry mouth and bad breath upon waking up in the morning?
Disease description:
For several days in a row, I've been waking up with a dry mouth and bad breath, even though I don't have any oral diseases. What could be causing dry mouth and bad breath upon waking?

Possible causes of dry mouth and bad breath upon waking include the following:
1. Improper diet: Consuming spicy, stimulating, or strongly flavored foods in the evening—such as stinky tofu or fermented herring—combined with inadequate oral hygiene, can leave lingering odors.
2. Indigestion: Irregular eating habits or eating before bedtime may lead to gastrointestinal indigestion, causing food to ferment in the stomach and produce bad breath.
3. Damp-heat in the spleen and stomach: Prolonged dietary irregularities or low immunity may result in excessive stomach heat, slowed gastrointestinal motility, and symptoms such as bad breath and a dry throat.
4. Poor oral hygiene: Bacterial buildup in the mouth, especially among individuals with periodontitis, gingivitis, or other oral diseases, makes dry mouth and bad breath more likely.
To alleviate these symptoms, it is recommended to maintain a healthy diet and regular作息 routine, improve oral hygiene, and seek medical treatment when necessary.