Why do things smelt out of your teeth stink, but you can't smell them in your mouth?

> > I believe that everyone has had a very confusing operation in ordinary times, that is, plucking the muddy substance on the surface of the teeth with fingernails, knowing that the smell is stinking, but still smelling it in front of the nose, that sour and refreshing It felt as if I had just finished picking my feet and smelling my fingers, sour but satisfying. >

I don’t know if you have ever wondered why these things smelt from your teeth, but you can’t smell them when they are in our mouths? Let's talk about this topic with you today.

First of all, what is the thing plucked from the teeth?

What the hell is the dirty stuff that comes out of the teeth? A mouth will give off a bad smell, and there will be dirt on the teeth, which is soft. In fact, these dirts do not appear suddenly, but are formed due to long-term accumulation, which is the bacterial compound in the mouth.

After eating, some food residues will remain in the mouth and stick to the teeth. If they are not cleaned in time, these residues will be eroded by bacteria in the mouth, resulting in fermentation and new substances. The yellow mud seen.

And because of fermentation, these dirts have a bad smell, which makes the whole mouth polluted and bad breath aggravated. At this time, the yellow mud on the teeth is still soft and easy to remove. If it is not treated, the damage to the teeth will be great.

If the yellow mud is not treated, it will always stick to the teeth. The bacteria in it will directly erode the teeth and cause damage to the teeth. At first, no problem can be seen. Speaking of dental calculus.

After the calculus increases, it sticks firmly to the teeth, causing damage to the gums and wilting. In addition, the teeth have been damaged by these yellow mud, and the teeth will be slowly eroded and broken little by little. If the inside is hollowed out, it is very likely that the teeth will collapse and fall out when you eat a certain time.

Because of the increase of bacteria on the teeth and the appearance of cavities, pain often occurs. We often say: toothache is not a disease, the pain is life-threatening. Damage to teeth.

I believe that everyone has had such an experience in normal times. Some people know that their mouth odor is very serious, but they don’t even know it. They even talk close to other people’s faces, which makes people around them miserable, so why can’t they smell them? What about mouth odor?

The ancients said it well: When you enter the abalone, you will smell it for a long time, but you will not know its odor. If you enter the room of the orchid, you will not smell its fragrance for a long time. It means that if you enter a warehouse full of stinky salted fish, you will no longer smell the odor of salted fish. If you enter a room full of fragrant orchids, you will no longer smell the fragrance of orchids. Your own bad breath will not be able to smell for a long time.

This phenomenon is called olfactory fatigue. The sense of smell is generated by nerve excitation through the olfactory organs. There is an olfactory mucosa at the top of the nasal cavity. The olfactory cells in the olfactory cells will produce nerve excitation of volatile substances, thereby transmitting this impulse to the brain. The central nervous system makes the human body feel the existence of the sense of smell. If a person stays in a certain irritating smell for too long, the stimulation time is too long, which will cause the fatigue of the olfactory nerve, and can no longer generate nerve excitation, and the sense of smell will fail.