Everything that I eat or drink except water has a bitter taste. This started a few days ago. I gargled with listerine and salt water. I brushed my tongue. I ate a piece of pie and it still tasted bitter. Why could it be?

Bitter taste. Certain medications cause a bitter taste as well as infections. There may be a systemic problem. A suggestion would be to identify when this problem developed, note any changes in diet or use of over the counter medication and discuss this with your primary care doctor.
This . This problem is actually not too uncommon and has a huge differential of potential causes such as: - nasal drainage - nasal polyps - bad tooth - gastroesophageal reflux - salivary gland obstruction/ dry mouth - medications - a neurological problem with the taste receptors and that's just scraping the surface! you should see your doctor or an otolaryngologist (ear, nose and throat specialist) for an exam and a work-up. Hopefully, if they can find the cause, they can fix the problem. Good luck!
Many possibilities. This could be coming from a variety of causes. You need to be evaluated by doctors who understand the implications of changes of taste sensation. An ENT might be a good place to start.

Related Questions

Everything that I eat or drink except water has a bitter taste this started a few days ago. I gargled with listerine and salt water. I brushed my tongue. I ate a piece of pie and it tasted bitter.

This . This is rather interesting. I would guess that this represents some reflux esophagitis symtoms. You might want to try some antacids to see if this helps over the next couple of days. Read more...
Time. There are many different reasons for this and most will pass with time with no consequence. If it continues, a good medical work-up would be suggested to rule out the things that do have a consequence such as acid reflux disease or mercury. Read more...

Everything that I eat or drink except water has a bitter taste. This started a few days ago. I gargled with listerine and salt water. I brushed my tongue. I ate a piece of pie and it tasted bitter. I have not eaten any pine nuts, unless they were in food.

This . This somewhat common problem has a huge differential of potential causes such as: - nasal drainage - nasal polyps - bad tooth - gastroesophageal reflux - salivary gland obstruction/ dry mouth - medications - a neurological problem with the taste receptors and that's just scraping the surface! you should see your doctor or an otolaryngologist (ear, nose and throat specialist) for an exam and a work-up. Hopefully, if they can find the cause, they can fix the problem. As far as pine nuts go, check to labels of the foods you are eating. Since nut allergies are so prevalent, companies are required to label foods that may have tree nuts (including pine nuts) in them. Read more...
Wait. There are multiple reasons for what is occurring and most will pass with a little time. If it continues, then a medical work-up would be in order to exclude acid-reflux disease, mercury, etc. Read more...