SIBO, constipation, psoriasis, bad breath, nausea

Constipation Is The Cause of Acid Reflux, Bad Breath and Nausea, Psoriatics!

It does not matter if you have or don’t have psoriasis – the common cause of acid reflux and usually morning nausea – is constipation combined with bacterial fermentation in the small intestine.

I know some of you psoriatics say “I am never constipated” or “I have acid reflux without constipation”.

Technically, you may be right but I use the term constipation in a more general way. You should not consider to be constipated only when you didn’t use a toilet in 3 or more days.

You can be constipated in the morning (and this is very common yet overlooked cause of acid reflux and morning nausea) immediately after you wake-up. And this kind of constipation is not due to inability to empty your colon but due to sleep when most people don’t wake-up from the sleep in the middle of the night just to take a poop. And often they have impaired the intestinal motility (Migrating motor complex) so the food stays and ferments in the small intestine for a long time.

Now let me explain to you why you are often surprised by acid reflux and nausea in the morning.

Low bile flow and constipation

If you have bad digestion or diet or both – and the chances are you have at least one of those since you landed on this blog post – the undigested polysaccharides (starches, cellulose) and protein are left for bacterial fermentation. Sure, there is also a yeast and fungal fermentation but just to keep it easier to understand for those who blame SIBO (small intestine bacterial overgrowth) for everything, we will be talking mostly about SIBO in this blog post.

SIBO pathophysiology and its health consequences.
Image By:
Allison Siebecker, AHS13 Allison Siebecker — Small Intestine Bacterial Overgrowth

When there is a low bile flow and generally weak production of digestive enzymes including the disaccharidases which are produced by cells of the small intestine then bacteria can feed and grow on undigested food you eat.


When bacteria ferment the food you eat they produce decent amounts of gasses like methane, hydrogen and carbon dioxide.

And where that gasses can go if not out of the body?

Bad breath is actually gas produced by bacterial fermentation

Even though the most of you think that fart is the only way how those gasses leave the body there are two possible ways.


The another way for the gas to leave your body is from the small intestine going up there through the stomach, esophagus and mouth.


And this way is way easier because it is about 50 cm (20 inches) from the mouth to small intestine. So, when bacteria (which should not be there in healthy person) in the beginning of the small intestine produce a lot of gas then it is easier for it to be released via mouth rather then “keep traveling” about 3 – 5 meters into colon and then another 5 feet (1,5 meters) just to leave the body as fart (flatulence).

Simple as that!


But the easier “small intestine to mouth” escape way has its consequences and will leave you with:

  • acid reflux as the gas pressing on esophageal sphincter allows the stomach acid leak into the esophagus
  • bad breath as some of the gasses produced by bacteria smell
  • you may feel nausea as the chemoreceptors in the stomach and small intestine are sensitive to toxins and it does not matter if they are in gaseous form [2]


The length of the small intestine and colon

  • Duodenum length: 25 – 35 cm (1 foot)
  • Jejunum length: 2,5 meters (8 feet)
  • Ileum length: 2-4m (6 – 13 feet)
  • Colon length: 1,5 m (5 feet)

Duodenum, Jejunum, Ileum and psoriasis

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