Phlegm is a thick, sticky substance produced by the respiratory system in response to irritation or an infection. It’s composed of mucus, cells, and different particles. Phlegm could be clear, white, yellow, or inexperienced, and it will possibly fluctuate in consistency from skinny and watery to thick and sticky.
Phlegm is a vital a part of the physique’s protection system. It helps to entice and take away international particles, corresponding to micro organism and viruses, from the lungs. Phlegm additionally helps to maintain the airways moist and lubricated.
