Breath smells like faeces (Poo)

1. Do you have your tonsils? If yes stick your finger back and touch you tonsil. Smell it, is it the same "poo" smell? If yes then you problem is pretty common. 

- gargle with hydrogen peroxide making sure to get it to your tonsils. It will loosen tonsillitis and can prevent new ones. If you can see white stuff in your tonsils that is a likely a tonsilith. Push around it with your toothbrush or finger if you can handle it. If it pops out then good. If it won't move then do the gargle for several days and try again. Still won't move? Go to ENT and they will get it out. 

- the enemy of a person fighting bad breath is adry mouth. Dry mouths makes breath worse. Everyone's tongue and mouth will smell when it's dry. Drink a ton of water. Do not use mouthwash with alcohol in it. Alcohol dehydrates mucus membranes in your mouth. Check of any medications cause dry mouth. If so you know why it's dry but don't stop the med unless you talk to dr. Try using a mouthwash that moisturizes mucus membranes like biotene. Avoid diet soda because it has salt which dries your mouth and caffeine which can dry.  Dry mouth can cause tooth decay too. People that breathe through their mouth at night often wake up with terrible breath because their mouth is completely dry. Also try adding lemon to water or sucking on lemon drops. Sour will make your saliva glands squeeze down and produce more saliva. Also no fake sugar. It dries mouth. Sugar free gum can exacerbate bad breath. But there is a new gum that actually helps with saliva and bacteria in the mouth. The sugar in the gum is xylitol. Otherwise fake sugar should be avoided. 

- try green tea. It has been found to help bad breath by calming stomach and safely killing/fighting bad breath germs. The caffeine in green tea is not a problem because of the stuff in it that helps your breath. Just one of those weird situations that a good part overrides the usually bad ingredient. 

2. If the smell isn't actually present in your mouth but coming up from your stomach then here's some stuff you can try:

- probiotic to control the bad bacteria and encourage good bacteria, start eating a yogurt daily

- always go to bed with an empty stomach. Digestion produces acid and laying down let's it flow into your esophagus. If you feel a lump in your throat you might have the acid issue. If you have heartburn you likely have the acid erosion. Try swishing your mouth with gaviscon then swallowing before bed. It will coat your stomach and keep acid in your stomach. 

- drink water to help water down the acid in your stomach

-try propping the head of your bed up on bricks, the slight incline will help keep acid down. Don't just prop your head with a pillow because it will make your torso bend a little which can cause the acid to migrate. You want to be flat but your head (mouth) should be higher than your neck which should be higher than your stomach, no bends. 

- try eating only bland foods for a few days to keep acid down and see if breath improves. You could try nexium too for acid. 

3. Do you have post nasal drip or extra mucus? 

- try a netti pot or nelimed sinus irrigation. Try with the saline and you could try a little but of baby shampoo. It's gentle enough for sinuses but the soapy part will break through biofilm in sinuses and make the saline work better/actually get to the mucus membranes. 

- try an OTC steroid nasal spray after the irrigation. 

- use a hypertonic saline rinse that comes in a can and sprays into your nose. I use one every night and it helps keep my congestion down (saline shrinks membranes and moisturizes) and I like to rinse out any environmental allergens I might have breathed in and are hanging out in my sinuses waiting to be cleaned about by mucus. I have mold allergy and decaying leaves outside cause mold and I inevitably breathe it in. I feel better the next morning not sleeping with it in my sinuses for several hours. 

4. The last area it have heard about but it isn't my expertise - do you have body odor? Like bad enough that someone has commented? Not like the sweaty smell under your pits but like your body smells. Like some people will say if they eat onions that their body seems to excrete a strange smell for several days. Like smelling their forearm smells weird. If you have noticed a personal body smell you might just have some sensitivities. You could keep track of what you eat and when you smell the odor and look for a correlation. Eliminate the food and see if it helps. Again drink a bunch of water and make sure your pee comes out clear. People digest some foods better than other foods and maybe you are eating something that your body just doesn't like. Not exactly an allergy but a sensitivity that is trying to alert you that there is a better food choice for you. 

I am not familiar with parasites and other causes people have mentioned. I hope one or all of these things help you. I had a close friend tell me my breath smelled like a fart and I'm the type tag appreciates the honesty. I immediately noticed my mouth felt so dry. Then I found out my migraine preventative causes dry mouth. I started massive amounts of water (at least 3 liters a day) and I use biotene and I've been asked if I have ever had bad breath before! Little do they know I used to have fart breath. Good luck!