Have you ever eaten a dish made with a lot of onions or garlic and wondered about the smell that comes out of your mouth afterwards? Or the unpleasant smell that comes out of your mouth when you wake up in the morning? It's actually normal to have a slight bad breath at times like these. However, if you continue to have bad breath no matter how much you brush your teeth and keep your mouth clean, it's something to be concerned about. In medicine, we call this condition "halitosis." Although this is usually not a sign of a serious illness, sometimes it can be a sign of a problem in our mouth or a medical condition elsewhere in the body.
How do you know exactly if you have bad breath?
This is the biggest problem. It's hard for us to know exactly what our own breath smells like. Even if we put our hand to our mouth and blow on it, we won't be able to tell exactly what it smells like. The best and easiest way is to ask a friend or family member you trust very politely. It's nothing to be ashamed of.
If you can't hear that, there's another thing to consider. If you constantly feel an unpleasant, bitter taste in your mouth, it's likely that you have a bad breath that others can smell.
Bad breath can come in many forms.
- Sometimes it can be like the smell of a cup of coffee you just drank.
- Other times, it may smell like spoiled fish or rotten eggs.
- Some people have a sour smell, while others have a surprisingly sweet smell. Each of these smells gives us some clues as to why.
Why does our mouth smell bad? What are the main reasons?
There is not one reason for bad breath, there can be many reasons. But about 90% of the time, the cause lies inside our mouth. Let's see what the main reasons are. I have arranged this in this way to make it easier for you to understand.
| Reason | Simply put... |
|---|---|
| Poor oral hygiene | This is the main and most common reason. When we don't brush our teeth properly, bacteria act on the food particles stuck between our teeth and produce odor-causing gases. It is also very important to clean our tongue as well as brushing our teeth. This is because a lot of these bacteria accumulate on our tongue. |
| Dry Mouth | Saliva is a natural mouthwash. When saliva production decreases, the mouth becomes dry, creating a favorable environment for bacteria to grow. Some medications, smoking, and certain medical conditions can also cause dry mouth. |
| Gum Disease | Plaque builds up on the teeth and if it is not removed properly, it can lead to gingivitis . If left untreated, it can develop into a more serious condition called periodontitis , which can cause bad breath and gum disease. |
| Tonsil Stones | The tonsils are small glands on either side of your throat. These glands can become clogged with food particles and dead cells, which can combine with calcium to form stones. These can produce a very unpleasant odor. |
| Respiratory system infections | If you have a sinus infection, throat infection, or lung infection (such as pneumonia), mucus and other secretions in your throat can cause bad breath. |
| Diabetes | People with diabetes are at higher risk of gum disease. Also, during a state called ketoacidosis , which occurs when insulin levels are too low, the breath can smell fruity (sometimes like nail polish remover). |
| Gastritis and GERD | Gastroesophageal Reflux Disease (GERD) can cause stomach acid to flow back into the throat and mouth, resulting in a sour taste and bad breath. |
| Kidney or liver disease | These are less serious, but not common, causes. When the body's function of filtering toxins is not working properly, those toxins can accumulate in the bloodstream and be released as bad breath. |
How does a doctor detect this?
If you have a persistent problem with bad breath, the first thing you should do is see a dentist. He or she will examine your mouth.
- They check the smell of your breath.
- They check for gum disease, cavities, and signs of gum disease.
- The tongue is examined.
Most of the time, the cause lies in the mouth itself. If there is such a problem, the dentist will prescribe the necessary treatment. Sometimes, a referral to a specialist in gum disease (periodontist) may be necessary.
However, if the dentist examines your mouth and says there is nothing wrong with it, you should then go see your family doctor (Primary Care Provider). He or she will check to see if there is another underlying medical condition causing this.
What are the treatments for this?
Treatment depends entirely on the cause.
- If the reason is poor oral hygiene:
- Having your teeth thoroughly cleaned by a dentist (dental cleaning).
- Brushing your teeth properly and flossing them daily.
- Tongue cleaning: This is something that many people neglect, but it is very important. It is best to use a tongue scraper specifically designed for tongue cleaning.
- Using an antibacterial mouthwash recommended by your doctor. (Some mouthwashes only temporarily mask bad breath, so ask your doctor about a type that treats the underlying cause.)
- If the cause is another medical condition:
- The only solution is to get proper treatment for the condition. For example, controlling diabetes and treating gastritis will help eliminate bad breath.
What can we do to prevent bad breath?
The best thing to do is to prevent the problem before it occurs. If you incorporate these simple habits into your life, you will find a great solution to the problem of bad breath.
- Brush your teeth twice a day with a toothpaste containing fluoride.
- Clean between your teeth with floss at least once a day .
- Clean your tongue thoroughly every day when you brush your teeth.
- If you wear dentures or retainers, clean them daily as directed by your dentist.
- Drink plenty of water. Drinking at least 2-3 liters of water a day will reduce dry mouth.
- You can increase saliva production by chewing sugar-free gum or sucking on a sugar-free mint.
- Reduce smoking, alcohol, and excessive caffeine (coffee, tea) consumption. These can dry out your mouth.
- Visit a dentist and have your teeth checked and cleaned at least once a year .
Don't worry too much about the bad breath that comes from eating pungent foods like onions and garlic. It's temporary. The smell may persist until the chemicals in those foods are completely eliminated from your body. It's okay to put something like mint or cardamom in your mouth at such times.
Take-Home Message
- It's normal to have bad breath from time to time, but if the odor persists even after you've kept your mouth clean, you should be concerned.
- Most often (90%) the cause of bad breath is a problem related to oral health. Just like brushing your teeth, it is essential to clean your tongue .
- Bad breath can also be caused by certain medications you are taking or an undiagnosed medical condition such as diabetes or gastritis.
- Don't be shy, see a dentist first. If his examination confirms that there is no problem with your mouth, see your family doctor for advice.











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