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Acid Reflux causes and Treatment

Why Does Your Breath Stink in the Morning?

Why Does Your Breath Stink in the Morning?


You know the drill. You wake up in the morning, you stretch, you yawn, and you realize that it kind of smells like something died in your mouth overnight. But, actually, if it makes you feel any better, it’s really the opposite. Your mouth makes that awful smell in the morning because whole colonies of bacteria have been growing in there all night. Bacteria really, really love the inside of the human body and your mouth, with its warmth and constant supply of food particles, is no exception. Your mouth bacteria aren’t all bad because, among other things, they help keep more dangerous outside bacteria from invading. But in many ways they are the lesser of two evils, because you can also thank your mouth bacteria for fun things like cavities and gum disease. Most of the time, your saliva helps keep the colonies under control by sweeping them and the food particles they eat down your esophagus. Your saliva also contains some antimicrobial agents like lactoferrin, which works by stopping bacteria from absorbing iron properly. But at night you don’t produce as much saliva. Your mouth becomes this warm humid breeding ground with plenty of tiny food particles and dead cells for all the growing colonies to feast on. As they eat, the bacteria produce a bunch of different odor causing compounds as waste products. Including hydrogen sulfide, which is the stuff that makes rotten eggs so stinky, methanethiol, also known as fart smell, isovaleric acid, which is what you’re smelling on your feet after wearing boots all day and also happens to be found in beer, and cadaverine, which Is responsible for the scent of rotting flesh. So when someone tells you that your breath smells like a corpse in the morning, that’s not really an exaggeration. Thank you to the Obviously Anonymous Person who asked us this question on Tumblr, and thanks to our Patreon patrons who keep these answers coming. If you’d like to submit questions to be answered or get these quick questions a few days before everybody else, you can go to patreon.com/scishow.

100 Replies to “Why Does Your Breath Stink in the Morning?”

  • Probably if you do not have a type of gum or type of life saver in your mouth or some breath freshener without those the bacteria inside your mouth with saliva could get in without you even noticing whether you are unconscious or subconscious but rarely conscious can invade your system.  A good thing to floss daily and brush your teeth for two minutes as well as wash your mouth with hot water if not mouth wash afterwards.

  • I have a question. Why is yawning contagious? Like I know it has something to do with empathy, but I don't understand why. Is there an evolutionary advantage or what is going on? 🙂

  • You should start announcing whomever actually asked the question! Unless the asked to be anonymous, of course.

  • So the real question is if everyone's breath smells like ass in the morning how or why tf do these people have morning sex lmfao nasty bro

  • and now try to drink beer all the night and maybe eat something after and sleep the taste and the breath is at is paroxism of stinkyness

  • Concise, quick, funny, and all around AWESOME video! I aspire to make my videos like yours! Your form of online education is just so great!

  • The picture at 0:10 describes why your breath stinks in the mornings in particular
    You gotta brush your tongue the night before, too. Honestly, the amount of times I see people obsessing over brushing their teeth but completely forgetting the gross, white sediments on their tongues. Scrub that layer until your tongue is nice and pink and I promise you, your breath won't stink nearly as bad the next day!

  • I hate eating as soon as I wake up since I have little saliva in the mornings for quite a while, obviously cereal is fine and so are most fruits but bread/toast is horrible, it becomes pasty and I have to wash it down with something.
    Which is why I brush my teeth before breakfast, so as soon as I wake up.

  • Tbh my breath doesnt smell in the morning. Im assuming its because my mouth is always closed during the night because of how i sleep

  • I once sneezed and a small hard disk of smelly white crud came out. I think it came from my tonsil and i think i figured out why i could not get rid of my bad breath no matter what i did. So basically i am screwed.

  • If you have a problem with bad breath constantly, look up tonsil stones. This helped me so much. Like so other people can see!

  • I'd like to know why coffee breath smells so bad…After getting rid of the bacteria goop in the morning after I brush my teeth, I drink coffee, and the bad breath starts to haunt me again…
    Should I drink coffee and then brush my teeth?

  • this video was based on the assumption that people brush their teeth before going to sleep, right? so i am assuming food particles that remain even after brushing the teeth contribute to the bad smell?

  • I hate my tounge and how it feels in my mouth when I wake up I can't describe how nasty it feels I can't drink water either or it will taste bad

  • Isovoleric acid–Now I don't think it's so weird that I always thought my dog's feet smelled exactly like Doritos. The smell under her eyes/side of her muzzle was unique…same smell for all dogs, but didn't smell like a food I've identified. So scishow, what's causing this smell under the eyes?

  • i know bacteria are present in the gut from start to end, but are they present in the blood system of a healthy human.

  • How to make my poop smell good ….im an average man and i want my poop to smell average. God it smells bad.. any solutions ?

  • Our breath stinks in the morning, because we sleep with our mouths open, And while we sleep, EVERY foreign object in the room, ends up in our MOUTH! 👄😰🙊

  • Good to know, thx for the info. NOW, if you would do a video on how to remove those foul odors without using chemicals, that would be even greater.

  • I am so happy that I have finally found something that is effective! And not just for me. For all the individuals who suffer from this, since it really can damage a person’s life. Right after employing this bad breath solution “Kanzοzο Zato” (Google it), my breath became noticeably better in just a couple of hours. My wife could now kiss me again contentedly! .

  • Brush your teeth in the morning and at night make sure you brush your tounge too especially the back atleast 2 to 3 times brush your gums and cheeks and the roof of your mouth brush the bottom rows of your teeth top rows of your teeth and behind your teeth. MAKE SURE YOU FLOSS and use mouth wash and make sure you drink water and eat healthy.

  • I have a serious bad breath problem from i was a teenager. Sometime ago i made a bad comment to my spouse and his reply to me was “it not me that you smell it is your mouth” i almost died and gone to hell with embarrassment i ask my mother and she said as far as she can remember my breath i had bad breath, until i came across this treatment method t.co/qh4ExqcjoW

  • My breath was very embarrassing. It is horrible that I forced myself to just stay home I attempted every little thing my dental practitioner told me to do but nothing worked for more than a few hours. Now I was able to get a fresher and also cleaner breath. My life back is finally back to normal due to this bad breath solution “Kοtοnzο Zοtα” (Google it). .

  • This bad breath treatment method “Kοtοnzο Zοtα” (Google it) was an absolute blessing. Right after reading everything in the book, I had been really surprised by it. I had no clue what was causing my terrible breath. Following this method helped me realize not just the cause of my disorder, but its solution too. My breath was really improved right after following every little thing in this informative guide. .

  • I had been beginning to have a serious complex about my breath and was truly struggling to speak with individuals because I was so concerned about what they may be "smelling", and how they`d react. This bad breath method “Kanzοzο Zato” (Google it) is amazing and yes it actually works. My breath is way better today! .

  • I find this bad breath treatment “Kοtοnzο Zοtα” (Google it) truly awesome. I read every little thing front to back and it is truly extraordinary. I didn`t know the cause of my stinky breath. Right after follow this technique, now I not just know why it is happening, but how to fix it too. My breath was really improved after following everything in this guide. .

  • My breath was really embarrassing. It is horrible which I forced myself to just stay at home I tried everything my dental practitioner told me to do but nothing worked for more than a couple of hours. Now my breath is fresher, cleaner and 100% better. My life back is finally normal again thanks to this bad breath treatment method “Kοtοnzο Zοtα” (Google it). .

  • Thank goodness, I have finally found an effective solution! And not only for me. For the individuals who have problems with this, as it can really wreck a person’s life. I was able to improve my breath in just a couple hours after I started out utilizing this bad breath treatment method “Kοtοnzο Zοtα” (Google it). My wife is satisfied to kiss me again! .

  • I had been beginning to get a serious complex about my breath and was really struggling to speak to individuals because I was really concerned about what they might be "smelling", and how they would respond. I truly find this terrible breath treatment “Kοtοnzο Zοtα” (Google it) quite effective. My breath is much better today! .

  • This bad breath treatment “Kοtοnzο Zοtα” (Google it) was an absolute blessing. I read every little thing front to back and it is really extraordinary. I really didn`t know what was causing my foul breath. Following this method made me realize not only the cause of my disorder, but its solution too. My breath was really improved right after following every little thing in this guide. .

  • My life was really gloomy a month ago. It is probably lowest moment of my life. The grounds behind all the ordeals was my smelly breath. I knew there was a problem with my breath when individuals just avoid me each time I begin a talk with them. Good thing I have discovered this effective stinky breath treatment “Kοtοnzο Zοtα” (Google it). My breath is much better now! .

  • I have a member of the family that has foul breath. Even if his mouth is closed, the odor still comes through her nose. She didn`t find any assistance from popping tic spearmint gum and breath mints. Nonetheless, she was tremendously helped by this stinky breath treatment “Kοtοnzο Zοtα” (Google it). Her breath has become better due to the guide. .

  • One among my family members is dealing with terrible breath. Even when his mouth is closed, the smell still comes through her nose. She didn`t find any help from popping tic spearmint gum and breath mints. Having said that, she was drastically assisted with this smelly breath treatment method “Kοtοnzο Zοtα” (Google it). Her breath has become better because of the guidebook. .

  • My husband’s oral problem was resolved by this smelly breath method “Kοtοnzο Zοtα” (Google it). He always fill his pocket with breath mint candies and also gums. When he chews gum and suck on mints it appears to only work at that time. He`s looking for something that could work for longer hours. This guide hasn`t disappointed him with regards to enhancing his breath. .

  • This bad breath treatment method “Kοtοnzο Zοtα” (Google it) assisted my husband. He always fill his pocket with breath mints as well as gums. As he chews gum and suck on mints it appears to only work at that time. He needed something to work for hours at a time. This guide hasn`t disappointed him when it comes to enhancing his breath. .

  • I used to be embarrassed about my breath. It is very bad that I forced myself to just stay home I attempted everything my dentist informed me to do but nothing worked for more than a few hours. Now my breath is fresher, cleaner and 100% better. My life back is finally back to normal due to this bad breath method “Kοtοnzο Zοtα” (Google it). .

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