what does yellow snot mean

Yellow snot can indicate that the body is fighting an infection. The yellow color comes from white blood cells that have rushed to the area to fight off the infection. However, it is important to note that yellow or green snot can also be caused by other factors, such as allergies or exposure to irritants. If yellow snot is accompanied by other symptoms, such as fever or overall feeling of illness, it may be a sign of a cold or infection. It is also worth noting that clear snot usually signals allergies or some kind of environmental factor that is triggering the nose to start running, such as inhaling dust or allergens.