what does bright yellow snot mean

Bright yellow snot is a sign that your body is fighting an infection. The yellow color comes from white blood cells that have rushed to the area to fight off the infection. Thick, yellow snot is a sign that your infection is progressing and may have developed into acute sinusitis. However, there is no need to panic as the yellow color is a good indication that your body is fighting off the infection. If you notice bright yellow snot, it is important to stay hydrated and get enough rest to allow your body to recover.