Know How Dentists Reduce Mouth Smell & Most Effective Bad Breath Solutions When it comes to finding bad breath solutions, one should first dig into the basic as well as scientific causes of it. When you try to find the basic lifestyle reasons, you'll find some bad eating habits, veggies such as garlic and onion, spices, tobacco, poor oral hygiene, and specific diseases. Yes, it's a fact that one can experience bad breath even after taking care of a lot.