What causes a patient to feel a sensation of dryness in the mouth?

What causes a patient to feel a sensation of dryness in the mouth?

• A. Hypofunction of minor salivary glands
• B. Hyperfunction of major salivary glands
• C. Excess saliva production
• D. Increased salivary flow rate

Answer: (A)

Dry mouth happens when saliva production falls below what the mouth needs to stay moist. The minor salivary glands provide baseline lubrication by continuously secreting mucus-rich saliva to coat the oral mucosa at rest. If these glands are underactive, that baseline lubrication diminishes, so the mouth feels dry or sticky even if the major glands could still respond later. Producing too much saliva or increasing the flow would make the mouth feel moist, not dry, so those scenarios don’t explain the sensation.

Dry mouth happens when saliva production falls below what the mouth needs to stay moist. The minor salivary glands provide baseline lubrication by continuously secreting mucus-rich saliva to coat the oral mucosa at rest. If these glands are underactive, that baseline lubrication diminishes, so the mouth feels dry or sticky even if the major glands could still respond later. Producing too much saliva or increasing the flow would make the mouth feel moist, not dry, so those scenarios don’t explain the sensation.