Why Does My Poop Smell Like Metal?

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When your poop doesn’t smell like it normally does, it can be alarming, especially if you aren’t sure why it’s happening.
This can be even more worrying if your feces has a metallic odor to it, because that’s not something you hear about every day or expect to happen at all.
When this occurs, you may find yourself wondering why does my poop smell like metal and what could cause this to happen? Luckily, the answer isn’t very complicated and will help alleviate any concerns you have about your bowel movements.

Odor Characteristics

A metallic smell can be a sign of health problems such as kidney disease, Crohn’s disease, ulcerative colitis and certain types of cancers.
However, not all metallic smells come from health problems.
There are many external sources that can make your poop smell like metal such as gallstones, accidental ingestion of pennies or consuming iron-rich foods.
Most cases of smelly poop will resolve without treatment within two weeks but if you still notice a bad odor after one week seek medical attention.

Foul odor

Have you noticed that your stool smells like metal? Although not very common, there are a few reasons why your poop may have an unusual odor.
Luckily, no matter what’s causing it, these bad smells typically clear up quickly on their own.
Here’s a look at what might be causing your smelly stools and when you should worry about it.

Metallic odor

Although a metallic smell in feces may be normal for some people, it can also indicate something more serious.
A metallic odor in your poop can result from many different things, such as eating or drinking certain foods or beverages that are rich in iron, copper or other minerals.
It can also result from digestive disorders such as colon cancer or Crohn’s disease, since these conditions can alter how waste is processed by your body.

Salty taste

When you’re dehydrated, your sodium levels drop.
When sodium levels are low, you experience what is known as hyponatremia.
To correct hyponatremia, your kidneys send excess water to your bladder, which then excretes more urine than normal.
That extra pee causes a lot of fluid loss —and some people report that they taste salt in their urine or stool when they’re dehydrated.

Bad breath

The most common cause of bad breath is, of course, poor oral hygiene.
Aside from being unpleasant, it can also be embarrassing and lead to social isolation.
Your mouth harbors a variety of bacteria (in fact, there are more bacteria cells in your mouth than there are human cells in your body).
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of these organisms do not cause illness.

Tarry stool

The most common cause of metallic poop is something called tarry stool, which looks like a long rope in your toilet.
This type of stool is considered a major warning sign and can be indicative of colon cancer.
If you see tarry stool, visit your doctor right away—it could save your life.

Abdominal pain

There are several possible causes of abdominal pain.
The most common cause is intestinal gas, but it may also be due to irritation or inflammation of the large intestine, appendicitis, diverticulitis, ulcerative colitis, irritable bowel syndrome (IBS), celiac disease or Crohn’s disease.
For such cases diarrhea and/or constipation is sometimes a symptom as well.


Typically, nausea and vomiting are associated with a number of factors such as food poisoning, allergies, pregnancy and many other things.
Nausea and vomiting is also one of those symptoms that can indicate serious underlying medical conditions.
If you notice that you have a constant urge to vomit or feeling nauseous consistently over a few days, then you should consult your doctor as soon as possible.


Acute diarrhea usually goes away on its own within a few days, and there are lots of ways to treat it to ease your symptoms and make you feel better.
However, if you experience chronic diarrhea, you might have an underlying health condition that needs treatment.
If your doctor can’t pinpoint what’s causing your symptoms, try changing up some of your diet habits—some people find relief by eliminating certain foods like wheat or dairy products.
Cutting back on refined sugar might also help keep your bowels regular.

Weight loss

If you’re experiencing a change in your poop smell, there’s a chance that it’s connected to your weight loss.
Often, people are more prone to diarrhea when they’re losing weight quickly and aren’t replacing their fluids properly.
If you have any issues with digestion or bowel movements while trying to lose weight, be sure to talk with your doctor.

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