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Insight Horizon Media

Why does my mouth smell fishy?

Author

Daniel Johnson

Published Mar 21, 2026

Why does my mouth smell fishy?

If you have kidney or liver failure or diabetes, your breath may smell fishy. When your diabetes isn’t under control, your breath may smell fruity.

How do I get rid of fishy breath?

Try these simple steps to make your mouth feel fresh and clean.

  1. Brush and floss more often.
  2. Rinse your mouth out.
  3. Scrape your tongue.
  4. Avoid foods that sour your breath.
  5. Kick the tobacco habit.
  6. Skip after-dinner mints and chew gum instead.
  7. Keep your gums healthy.
  8. Moisten your mouth.

Why does my daughter’s breath smell like fish?

Trimethylaminuria (TMAU) is an uncommon condition that causes an unpleasant, fishy smell. It’s also called “fish odour syndrome”. Sometimes it’s caused by faulty genes that a person inherits from their parents, but this isn’t always the case. There’s currently no cure, but there are things that can help.

How can I check if my breath smells?

Try the sniff test—there are a couple of ways to do it. If you lick your wrist, let it dry for a moment, then take a whiff, you should be able to get an idea if your breath has an odor too. Another method is to floss toward the back of your mouth, then smell the floss.

What does halitosis smell like?

Breath which smells like rotten eggs often indicates an issue that stems from the digestive tract. Because the gut microbiota breaks down sulfur, an eggy-smelling gas is released. Causes for this can include Gastroesophageal Reflux Disease or GERD. GERD occurs when the stomach acids creep back up the esophagus.

Why do I taste fish in my mouth?

Metallic Taste Symptoms It often happens after eating some pungent foods like onions, garlic or certain fish. This temporary experience doesn’t mean you have metallic taste. However, a persistent sensation of sour, bitter or metal taste in the mouth may be a sign of a taste disorder.

Can you smell bad breath when kissing?

Some people believe that they can catch bad breath from kissing or sharing a drink with someone who suffers from the condition. However, the condition isn’t contagious. The bacteria that cause halitosis usually stay in the affected person’s mouth, and other conditions that cause bad breath aren’t contagious either.

Why does my breath smell like poop even after I brush my teeth?

Poor oral hygiene can cause your breath to smell like poop. Failing to brush and floss your teeth properly and regularly can make your breath smell because plaque and bacteria accumulate on and between your teeth. Food that’s not removed by flossing stays between your teeth, causing your breath to smell unpleasant.

Why does my BF breath smell like poop?

Sinus and respiratory infections may also cause a person’s breath to smell like feces. Infections like bronchitis, colds, viruses, and strep throat generate bacteria that move from your nose to your throat, causing pungently offensive breath.

Why does my husband smell like fish?

Fish odor syndrome is characterized by an offensive body odor and the smell of rotting fish due to the excessive excretion of trimethylaminuria (TMA) in the urine, sweat, and breath of affected individuals. Fish odor syndrome is caused by mutations in the FMO3 gene.

Why does my water taste like fish?

Quick Facts: A fishy smell can be caused by some elements like Barium or Cadmium metals. Chloramine is a compound of chlorine and ammonia used to disinfect public water sources. The long term solution to this smell will likely have to come from your local water supplier.

How do you get kissable breath?

Smelly breath? Here are 13 ways to ensure you’re always kissable!

  1. Limit your intake of protein.
  2. Chew crunchy, healthy foods.
  3. Eat good ol’ greens.
  4. Drink plenty of water.
  5. Chew on mint or parsley leaves.
  6. Include your tongue in your brushing routine.
  7. Floss daily.
  8. Avoid smoking.

What causes fishy breath?

Trimethylaminuria and the Fishy Odor. Bad breath usually originates in the oral cavity, but in rare instances, it can be a systemic problem. One such cause is a genetic disease named trimethylaminuria, which is a metabolic disorder of the gastrointestinal tract according to the International Journal of Oral Science.

Does a vagina really smell like fish?

Along with a fishy smell, you may also notice a milky-white discharge from your vagina. The odor becomes strong usually when you have unprotected sex and semen mixes with vaginal secretions. It is also common for vaginal odor to become strong when you’re having your period.

Why does my butt smell like fish?

Even normal anal sacs or glands sometimes secrete a foul fishy smelling liquid, but normal expression is supposed to occur when the dog defecates. So if your dog smells like fish all the time, something is wrong. Infected anal glands can also rupture and drain pus.

Why does my breath smell like boiled eggs?

Bad Breath Smells Like Rotten Eggs. The smell of sulfur ( sulphur ) or rotten egg burps originates from hydrogen sulfide (H2S), a gas stemming from sulfur-containing proteins in particular foods (see below) after they are broken down in the stomach or small intestine by sulfur-reducing microbes.