Post-nasal drip occurs when you produce too much mucus or it gets too thick and begins to overflow into the back of the throat. It is often the result of a cold, sinus infection or allergies. Post-nasal drip typically causes irritation to the throat and a cough.
Treatment for post-nasal drip is determined by the cause of the condition. If it is the result of a bacterial infection, antibiotics are an effective method. For post-nasal drip caused by allergies, sinus issues or a virus, your doctor may instead recommend a decongestant, antihistamine or nasal spray.