What are the causes of a bitter taste in the mouth?

Generally speaking, a bitter taste in the mouth refers to oral bitterness. This condition may be caused by reduced saliva production, emotional distress, vitamin B2 deficiency, periodontitis, gastric ulcers, and other factors. If the aforementioned conditions occur, it is recommended to seek timely medical treatment. Specific analyses are as follows:

1. Reduced Saliva Production

Saliva plays a role in cleaning and lubricating the mouth. When saliva secretion is insufficient, food residues and bacteria in the oral cavity cannot be effectively removed, which can lead to bad breath and a bitter taste. It is important to drink plenty of water daily to keep the mouth moist.

2. Emotional Distress

Long-term mental stress, anxiety, depression, and other negative emotions can affect the body's endocrine system, leading to decreased saliva secretion and taste disturbances, thereby causing a bitter taste in the mouth. Relaxation techniques may help alleviate these symptoms in daily life.

3. Vitamin B2 Deficiency

This condition results from inadequate dietary intake or impaired absorption of vitamin B2. Vitamin B2 is essential for maintaining the health of the oral mucosa. A deficiency can damage the oral mucosa, leading to the aforementioned symptoms, possibly accompanied by glossitis or cheilitis. Treatment may include vitamin B2 tablets, multivitamin tablets, or injectable riboflavin phosphate sodium under medical supervision.

4. Periodontitis

Periodontitis is usually caused by poor oral hygiene and dental plaque buildup. Inflammation can lead to congestion and swelling of the oral mucosa, affecting saliva secretion and taste function. Additionally, inflammatory secretions and bacterial metabolic byproducts may contribute to a bitter taste. Symptoms may include halitosis and gum bleeding. Patients should follow medical advice to take medications such as minocycline hydrochloride tablets, metronidazole tablets, or amoxicillin capsules.

5. Gastric Ulcer

Genetic factors and Helicobacter pylori infection are common causes of gastric ulcers. Gastric ulcers may lead to excessive gastric acid secretion or bile reflux into the esophagus and oral cavity, irritating the oral mucosa and taste buds, resulting in a bitter taste. Symptoms may also include stomach pain and bloating. Treatment should follow medical guidance using medications such as lansoprazole enteric-coated tablets, hydrotalcite chewable tablets, or Xiangsha Yangwei Pills.

Maintaining healthy lifestyle habits is important, including a balanced diet, adequate rest, moderate exercise, and good oral hygiene, to prevent oral discomfort symptoms such as a bitter taste in the mouth.