What are the causes of dry mouth and throat?

There are various causes of dry mouth and thirst, mainly including: 1. Physiological factors: such as tension, emotional stress, and mouth breathing. These factors may reduce saliva secretion, leading to dry mouth and thirst. 2. Diet and fluid intake: Insufficient water intake, excessive consumption of dehydrating beverages such as coffee, tea, and alcohol, as well as eating spicy or salty foods, can all lead to dry mouth and thirst. 3. Age-related factors: With aging, the function of salivary glands may decline, making dry mouth a common issue among the elderly. 4. Medication side effects: Certain medications, such as antihypertensive drugs, anticholinergics, antihistamines, and antidepressants, may interfere with normal saliva secretion, causing dry mouth. 5. Diseases or health problems: Such as diabetes, Sjögren's syndrome, hyperthyroidism, and gastrointestinal disorders. These conditions may lead to salivary gland dysfunction or hormonal imbalances, resulting in dry mouth.