You can feel while bad breath occurs.

As the bad breath originates in the mouth, it is hardly possible to be aware of this problem through its own taste or odor. You might notice an acid or bitter taste in the mouth or see a white layer at the back of the tongue. Often, however, does not discover the problem until a family member, colleague or a friend you do know.
The most common symptoms are:
• white layer in the language
• noted that brushing and flossing do not help
• dry mouth, thick saliva, tongue burning
• unpleasant taste in the morning
• white pieces in the tonsils
• worse after the consumption of dairy products
• worse after the consumption of alcohol, coffee or candy
• people in their environment offer chewing gum or Mintdragees very often
• people departed the face or takes a step backward
• flavor acid, bitter or metallic persistent