Do I need antibiotics for catarrh?
It’s a prevailing myth that anyone with green phlegm or snot needs a course of antibiotics to get better. Most of the infections that generate lots of phlegm and snot are viral illnesses and will get better on their own although you can expect to feel pretty poorly for a few weeks. Call your doctor within a few days if you have white, yellow, or green mucus that occurs with symptoms such as fever, chills, coughing, or sinus pain. These could be signs of a bacterial infection that requires antibiotics.