Definition
Phlegm refers to the thick mucus produced in the respiratory passages, especially in the throat or lungs. It's what you might cough up when you have a cold or infection π€§. Think of it as your body's way of trapping and removing irritants or germs. Unlike saliva, which is clear and thin, phlegm is usually thicker and can be colored. It can be a sign that your body is fighting something off, like a warrior defending a castle π°. Sometimes, excessive phlegm production indicates an underlying health issue. So, while everyone produces some phlegm, changes in color or amount are worth noting.