<s>[INST] I have a persistent bad taste in my mouth and I am always smelling a bad odor.  Coffee no longer smells good.  Foods and drinks take on the bad taste that I experience.  The taste to me seems to be bad garlic and onions mixed with stale coffee.  Any suggestion?  my  blood work has been normal [/INST] Hi. Thanks for the query. Bad smell in mouth and bad taste can be due to a number of causes like poor oral hygiene, oral and dental infections, post nasal Chat Doctor. . If you regularly eat onion and garlic in raw form then it can also be a cause for bad taste and bad smell from mouth. So my suggestion is to consult an Oral Physician and get evaluated so that the exact cause can be narrowed down. For now start gargling with a flavored mouthwash twice a day. You should chew flavored sugar free chewing gum. Do warm saline gargles twice a day. Limit the intake of high aroma foods like onion and garlic. Steam inhalation with a few  </s>