Why would it be that my mouth still is smelly even if i brush my teeth everyday and everynight?

It Depends: How long has it been since your last dental exam? Do you floss? Many things can cause bad breath including mouth breathing at night, smoking, build up on teeth, an abscess, improper cleaning methods, excessive use of alcohol or alcohol mouthrinses, or even your diet or some systemic disease. You need to have a complete exam by your dentist and tell them that you have problems with your breath.

Bad breath,Halitosis: Bad breath can be caused by several reasons. Starting with mouth, poor oral hygiene, gum disease dry mouth and not cleaning the tongue everyday could cause bad breath. Systemic causes could be stomach problems such as acid reflux and chronic sinus infections can cause bad breath. Check with your physician and dentist