Why don't people know when their breath smells badly?
95159
The olfactory bulb is the sense of smell. It is an accessory nerve sense. It adapts quite readily. That is why we get used to a smell and we can not smell it anymore. For instance, if you spray perfume on, you can only smell it for a short while. These sensory bulbs adapt and you can no longer notice it, another person walks up and notices quite readily.
930948
I think it is when it reacts with the air once it dries. I know that if I have had a hard day (renovating a house at the mo) I can sweat and not smell straight away, but if I don't wash until the next morning there is definately an aroma!! Not that I leave it that long!!I also think it depends on the person and of course what you eat! I could be wrong but I'm just not a smelly person.
757027
Click the link below for the low down on bad breath.  I love garlic!\n\nMouthwashes tend to disguise bad breath instead of curing or preventing it. In fact, some conventional mouthwashes leave our mouth dry and thereby make it more hospitable to bacteria. Chlorine-dioxide-based mouthwashes are the latest in bad breath prevention. These mouthwashes attack the sulfur compounds responsible for bad odor. The simplest way to rinse the mouth, dislodge food particles, and stimulate saliva flow is by drinking water
774501
If you're serious:\nheath, diet and hygiene are the the big three effects on how a person smells.\n\nIf you're kidding:  Some people just stink.
382406
Yes.  You have bad breath.  Go see a dentist and then a doctor.
99660
chief cause of halitosis is inadequate cleanin of the posterior 1/3rd of tongue. every1 scrapes the anterior visible part but that is jst 15% of job done. u will gag when doin this but do it neway after deep inhalation.\n\nchew sugar free gums. these stimulate ur salivary flow which helps to reduce bad breath  and caries.\n\nif u hv gum infection, it can cause oozin of pus which gives u the smell. besides, cavity in any tooth may cause the same. so get dental prohylaxis done regularly.\n\ndont let ur mouth dehydrate. drink plenty of water nd gargle after eating or drinkin nethin.\n\nif u hv acidic regurgitation, get urslef treated for tht.\n\nmouth rinses can b used in addition to all these.
241412
Persistant bad breath is a sign of periodontal disease.  This is something you are going to have to see your dentist for.  If it is a severe case then your general dentist will refer you to a periodontist (gum disease specialist) for treatment.  Your medical doctor will not be able to treat this.
1145540
Well, assuming you want to addresss the problem, and not just cover up things, the best thing for common bad breath is to practice good oral hygiene, although I am pretty guilty of popping gum or a mint when I can't get to a toothbrush.  A common cause for bad breath is gum disease so you might want to look at that angle. \n\nAnother common cause is having a dry mouth, maybe sipping water more frequently can help.  But if you have chronic bad breath and you've elminated the above as possible sources also be aware some stomach disorders and even a sinus infection can cause bad breath.  A trip to your doctor might give a clue.\n\nThere were pills around that said they worked in the stomach to cure food odor, but many oil based food odors, such as garlic, actually get into the bloodstream and the odor comes from the respiratory system and not the stomach.  They were mostly clove oil based but I haven't seen them around lately.
12123
I guess there is no answer to this question!  Why don't people keep themselves clean in general?? LAZINESS!!!\nI see people with nasty teeth, hair, nails, clothes and  they just don't care!  I was three people away from a lady the other day and I could smell her breath!! YUCK!  People just don't care enough about themselves!
9344
Bad breath can be caused by many things.  First choice would be tooth decay or some gum disease, which should be treated ASAP.  Also a good dental hygiene is necessary, but brushing your teeth 4 times a day would be simlply too much!!! and might even cause some gum problems and tooth enamel abrasion, so brushing twice a day, and flossing once a day should do it. Also, don't forget to brush Your tongue as well. If You have any gum bleeding during brushing (if the toothpaste You spit out is pink), then it's probably parodontitis (chronic gum inflammation), which should be treated by a doctor and could be helped by Your side with mothrinse Corsodyl, which contains chlorhexidine to treat the gum. \nBut there is another aspect.  If all of the above is not an issue, then perhaps there is some general health problem causing bad breath:  first would be some gastric problems (stress induced gastric wounds) or most likely Your toncils.  If toncils are not working correctly as a guardian of our immune system, then they might become covered with bacteria all year round, causing several throat inflammations every year and might give really bad breath, plus they even might cause serious heart damage in the long term.  If that's the case, they need to be removed. So, it's either Yor teeth, gum, stomack or toncils.
775831
Human sense of smell is designed to identify things which are bad for you so you can keep away from them/not eat them/not smell them, in order to avoid disease.\n\nEveryone's gut contains bacteria - often a specific combination of bacteria that your own gut has built up for itself and finds useful in digesting food and fending off 'alien' bacteria.  \n\nEssentially this means that your nose is smelling someone else's gut bacteria and recognises them as alien and not good were you to ingest them for any reason. \n\nSo it's just your nose's way of telling you that these bacteria are bad and not to get too close - that's why some smells are 'bad' and some are not.
373160
It is most likely because of the sick people, germs in the air, and various medicines or chemicals they have there. Have you ever had any of those medicines that smell horrible when you're about to swallow them? thats the most probable reason i can think of. Doctors' offices have many different chemicals in them for major or minor surgeries and just taking care of people
98540
the smell of it. some people like it and some people dont
627006
It's better to come from you then have him walking around stinking without knowing it.  It's possible he needs dental work done.  There are also stomach diseases that cause bad breath too.  It's time to have a sit down and just straight talk about it.  He might seem hurt but in the end he'll be grateful you told him.
437067
All the answers are correct.  Floss, brush your tongue, use a good mouth wash like, Listerine, brush at least twice a day or after every meal.  Also certain infections or plaque built up on your teeth can cause bad breath.  See your dentist regularly.  Some people with bad breath is not caused by anything in the mouth.  It could be your digestive system.
110228
I'm kinda ticked off.  Apparently, I've reached my daily limit of questions on here.  See here's my problem... my breath really stinks.  I was thinking about going and brushing my teeth or at least swishing some Scope around, but I'm pretty lazy and the bathroom is like 40 feet away.  Plus, I'll probably have dinner within the hour and I don't want the toothpaste taste mixin' w/ my chicken and/or asparagus.  I was gonna ask for insight into my predicament but lo and behold Yahoo Answers provides no answer.  Jerks.  What's this question about?  Marijuana?  Well, I guess if I was smokin' weed right now I wouldn't be so worried about my bad breath.
527494
it smells bad, for the benefit of those who didn't hear it