Hi. i have a foul smelling and tasting drainage from the back of my nose. i don't have a cold, the flu, nothing. it really smells horrible!

Sinus infection?: Do you have a history of sinus infections? Did you have a cold recently? Any headaches? Facial pain or pressure? Cough when lying down at night? Not all sinus infections need to be treated with antibiotics. I would drink plenty of fluids also. If the symptoms get worse, or if start coughing more or get fevers, i would see your doc.