White tongue: causes and how to clean it

If you see a white tongue when you look in the mirror, you are not the only one: it is very common. In most cases, it is a layer of food debris, dead cells, and bacteria trapped between the papillae of the tongue. It is usually related to hygiene, dry mouth, or certain habits, and almost always improves by cleaning the tongue well and drinking enough water.

In this article, we will explain what a white or coated tongue is, what its most frequent causes are, how to clean it at home, and in what cases it is advisable to have it checked by your doctor or dentist.

What is a white or coated tongue?

Coated tongue is the name given to a tongue covered by a whitish or slightly yellowish layer, especially in the central and posterior part. This layer is called "saburra" and is formed by food debris, cells that detach from the mucosa, bacteria, and other microorganisms that naturally live in the mouth.

The surface of the tongue is not smooth: it is full of small papillae that form grooves and ridges. When these papillae become slightly inflamed or elongated, or when there is little saliva to wash away the debris, dirt accumulates between them and the tongue appears white. That is why it is so common to notice it in the morning: during the night, we produce less saliva and the tongue is cleaned less effectively by natural means.

A coated tongue usually does not hurt and is not serious, but it can be accompanied by bad breath, a pasty mouth sensation, or changes in the taste of food.

Most frequent causes of a white tongue

When you look for the causes of a white tongue, one or more of these factors are usually behind it:

• Insufficient oral hygiene: brushing your teeth and forgetting about your tongue is the most common cause. Debris accumulates day after day.
• Dry mouth: saliva helps wash away debris and bacteria. When there is little of it, the tongue becomes covered more easily.
• Dehydration: drinking little water, especially in summer or after exercising, reduces saliva production.
• Tobacco: smoking irritates the mucosa, dries out the mouth, and promotes changes in the color of the tongue.
• Alcohol: it also dries out the mouth and can irritate the papillae.
• Mouth breathing: at night, if you snore or have a congested nose, your mouth dries out and your tongue appears whiter in the morning.
• Fever, colds, or general malaise: when you don't feel well, you eat less, drink less, and talk less, so the tongue is cleaned less effectively. It usually disappears when you recover.
• Some medications: certain drugs, such as antibiotics, can alter the balance of the oral flora. Others can cause dry mouth. If you think a medication is affecting you, discuss it with your doctor or pharmacist; do not stop taking it on your own.

Causes that should be assessed by a professional

In some cases, a white tongue is not just "saburra" and should be reviewed by a professional. It is not a reason for alarm, but it is a reason to book an appointment:

• Oral candidiasis: this is a fungal infection that usually appears as white patches, sometimes somewhat creamy, which may hurt or leave the area reddened when removed. It is more frequent after taking antibiotics, in people who use corticosteroid inhalers, or in those with a weakened immune system. It requires diagnosis and medical treatment.
• Leukoplakia: these are white patches that cannot be removed by scraping or brushing. They are strongly associated with tobacco and should always be assessed by a dentist or doctor.
• Other mucosal alterations: there are other less frequent conditions that can cause a whitish appearance. Only a professional can determine what it is.

Other tongue colors

A healthy tongue is usually pink, moist, and has a very thin whitish layer. Sometimes it changes color for insignificant reasons, such as what you have eaten or drunk. These are some common changes, explained in a general way:

• Yellow tongue: often it is a more accumulated coated tongue or stained by coffee, tea, or tobacco. It usually improves with good cleaning.
• Brown or dark tongue: it can also be due to pigments from food, drinks, or tobacco that remain in the papillae.
• Red tongue: it can appear with irritation, burns from hot food, or some nutritional deficiencies. If it persists over time, it is advisable to consult a professional.
• Tongue with spots: some people have what is called geographic tongue, with smooth, reddish areas that change location, which is generally benign. Any spot that does not disappear or that hurts should be checked by a professional.

The color of the tongue alone is not enough to diagnose any disease. If a change worries you, it is best to have it seen by your doctor or dentist.

The tongue can change color for many reasons

How to clean a white tongue

When a white tongue is due to the accumulation of debris, the best approach is to incorporate some simple habits into your daily routine:

1. Use a scraper every day. A tongue scraper is designed to remove the layer that accumulates on the tongue without irritating the papillae. Move it from back to front, gently, 5 to 7 times, and rinse it with water between passes. Here we explain in detail how to use a tongue scraper.
2. Brush your teeth well. Twice a day, for about two minutes, and don't forget to clean between your teeth with dental floss.
3. Drink water throughout the day. A well-hydrated mouth produces more saliva and cleans itself better.
4. Check your habits. Reducing tobacco and alcohol, and breathing through your nose whenever you can, helps prevent the tongue from drying out.
5. Watch what you eat. A varied diet, with crunchy fruits and vegetables, also helps to naturally clear away debris.

A toothbrush can also be used on the tongue, but its bristles tend to move the "saburra" more than remove it, and they can be uncomfortable. The scraper collects the layer in a single pass and is more comfortable for daily use. Ours is made of copper, plastic-free, vegan, and cruelty-free.

Super tip: combine tongue cleaning with a toothpaste with xylitol. If you want to know more about this ingredient, we recommend reading our article on xylitol.

When to go to the doctor or dentist?

Normally, a white tongue improves in a few days with good hygiene and hydration. Book an appointment with your doctor or dentist if:

• The white tongue lasts more than 2 or 3 weeks despite cleaning it well.
• It hurts, stings, or you feel a burning sensation.
• You have white plaques or patches that do not go away when scraping or brushing, or that bleed when removed.
• It appears along with fever, general malaise, or swollen lymph nodes.
• You have sores or wounds that do not heal.
• It is difficult for you to swallow, chew, or speak.
• You have started taking a medication and it appeared right after.
• You have a weakened immune system, diabetes, or another chronic disease.

Your dentist can also check your tongue during regular check-ups, so it is a good time to mention any changes you have noticed.

In summary

A white or coated tongue is very common and, in most cases, is due to insufficient cleaning, dry mouth, or habits such as smoking. Cleaning your tongue every day with a scraper, brushing your teeth well, and drinking water is usually enough for it to return to its pink color. And if it does not improve in a few weeks, it hurts, or you see plaques that do not go away, consult a professional.