We are quite familiar with the fact that consumption of certain foods like onions and garlic can affect our breath. This happens because these types of foods are mainly absorbed by the bloodstream and then it is transferred to our lungs, thus we exhale bad breath. However, the bad breath that is caused due to consumption of certain foods is temporary and it is eliminated after few hours. But the bad breath that is caused due to tobacco products, smoking, periodontal disease, improper cleaning of dentures and poor oral health need immediate medical attention as bad breath caused due to these reason may cause further damage to your oral health. Bad breath that is caused due to above mentioned reasons may adversely affect the bloodstream, lungs and stomach.