What Causes Dry Mouth and Bitter Taste, and How to Address It

Generally, dry mouth and a bitter taste may result from insufficient water intake, staying up late (leading to “internal heat”), gingivitis, chronic gastritis, or cholecystitis. Patients may choose among general measures, pharmacological treatment, or surgical intervention based on their specific condition. A detailed analysis follows:

1. Insufficient Water Intake

Insufficient daily fluid intake leads to dehydration of the oral mucosa and reduced salivary secretion, resulting in dry mouth and a bitter taste. Regularly drinking warm water throughout the day helps maintain oral moisture and establishes healthy hydration habits.

2. Staying Up Late (Inducing “Internal Heat”)

Chronic sleep deprivation disrupts metabolic balance and promotes excessive internal heat, impairing salivary secretion and causing oral dryness and bitterness. Maintaining a regular sleep schedule—going to bed early and rising early—ensures adequate rest. A light, balanced diet with limited spicy and heat-inducing foods is also recommended.

3. Gingivitis

Inflammatory changes in the gums disrupt the oral microbiome and cause accumulation of inflammatory exudates, contributing to dry mouth and bitterness. Under medical supervision, medications such as artificial bezoar and metronidazole capsules, amoxicillin capsules, or roxithromycin tablets may be prescribed. Consistent twice-daily toothbrushing and routine oral hygiene are essential.

4. Chronic Gastritis

Chronic inflammation of the gastric mucosa impairs gastrointestinal digestion and causes upward reflux of stomach qi, manifesting as oral bitterness and dryness of the mouth and tongue. Under medical guidance, proton pump inhibitors such as omeprazole enteric-coated capsules or rabeprazole sodium enteric-coated tablets, along with antacids like aluminum magnesium carbonate chewable tablets, may be used. Eating regular, balanced meals and avoiding spicy or irritating foods is advised.

5. Cholecystitis

Inflammation of the gallbladder disrupts normal bile excretion, leading to bile reflux into the esophagus and oral cavity, persistently causing dry mouth and bitterness. Under medical supervision, anti-inflammatory and cholagogic agents—including Xiaoyan Lidan tablets, Daning tablets, or ursodeoxycholic acid capsules—may be prescribed. In severe cases, laparoscopic cholecystectomy may be required.

In daily life, maintaining good oral hygiene, adhering to regular sleep-wake cycles and a healthy diet, ensuring adequate hydration, minimizing late-night activity and overeating, and seeking timely medical evaluation and targeted management for persistent symptoms are all crucial preventive and therapeutic measures.