What Causes Thick or Viscous Saliva?

Nov 29, 2021 Source: Cainiu Health
Disease description:

The child has recently been frequently spitting up phlegm, and the expelled phlegm is notably thick. What causes thick, viscous saliva?

Doctor's answer (1)
Dr. Feng Tao
Thick or viscous saliva may result from insufficient water intake, hot weather leading to excessive sweating, or a diet excessively spicy or high in salt. Oral conditions—such as oral ulcers—may also cause this symptom. Additionally, gastric inflammation or ulcerative diseases can contribute to thickened saliva.