What causes dry mouth and thick yellow phlegm?

Symptoms of dry mouth and throat accompanied by yellow phlegm are usually caused by the following factors: 1. Poor oral hygiene: Long-term consumption of spicy and irritating foods may irritate the throat, leading to dryness in the mouth and throat, possibly accompanied by yellow phlegm. 2. Upper respiratory tract infections: Conditions such as colds or pneumonia may cause lung inflammation, resulting in yellow phlegm and symptoms of dry mouth and throat. 3. Excessive stomach fire: Improper diet, especially excessive intake of spicy and greasy foods, may lead to excessive stomach fire, causing dryness in the mouth and throat. 4. Yin deficiency with internal heat: Insufficient body fluids (yin deficiency) can result in internal heat, which may cause dry mouth and throat, sometimes accompanied by yellow phlegm. The causes of dry mouth and throat with yellow phlegm may involve multiple aspects including oral hygiene, upper respiratory infections, excessive stomach fire, and yin deficiency with internal heat. If symptoms persist or worsen, it is recommended to seek medical attention promptly for accurate diagnosis and appropriate treatment.