yes post-nasal drainage from the sinuses can definitely leave a bad taste in your mouth (mostly in the mornings after a night of dripping). allergies colds environmental irritants chronic or acute sinusitis can be involved. of course there can be dental reasons as well. make sure to stay will hydrated by drinking plenty of water. if you have a cool mist humidifier use it at night for a while to see if it helps. moisturize your nose with saline nasal spray before going to bed. if this helps great but if you are having any signs of infection you will need to see your medical provider for a proper examination.
i have a bad taste in my throat is this caused by mucus dripping down my throat? . the taste isn't there always it comes and goes. is this at all related to sinues or mucus?