| MadSci Network: Medicine |
There is not much clinical significance to the different colors of throat mucus. Although clear is the normal color, yellow, white, and green mucus all usually indicate infection-fighting cells in the mucus. Brown mucus usually indicates some blood mixed in with the mucus; this is pretty normal with any irritation of the throat. The different colors do not help to decide whether a sore throat is a virus infection or Strep throat (which is a bacterial infection).
Try the links in the MadSci Library for more information on Medicine.