Brush teeth or mouthwash after meal

Why we need to brush our teeth or use mouthwash after every meal? It is important as relates to the problem of Bad Breath. After eating, food particles can remain in our mouth, which promotes bacterial growth between teeth, around the gums, and on the tongue. Food which is exposed out for long time will spoil. That spoiling action is due to anaerobic bacteria breaking down proteins in that particular food. Bacteria in mouth creates the volatile sulfur compounds of bad breath and taste disorders. That is why it can cause bad breath to a person. Bacteria can also cause gum disease (also known as gingivitis) and brings bad breath.

进食后，食物残渣会留在口中，从而促进牙齿之间的细菌生长，甚至牙龈周围和舌头上。如果食物残渣暴露在口腔中太久会坏掉。这是由于细菌在无氧气情况下会破坏含蛋白质的食物，进而制造口臭和味觉紊乱的挥发性含硫化合物。细菌也可引起牙龈病（也称为牙龈炎）。牙龈炎也会导致口臭。

Below is a video that explains the effect of bad breath. Although is a joke , but is also a good video to share and alert us. By the way, doctors, don't take it so serious on the storyline of this video ><.