Leukoplakia (White Patches in the Mouth)
Leukoplakia is a white patch inside the mouth that won't scrape off. Most people find it by accident, running their tongue over a rough spot or spotting it in the mirror. It usually doesn't hurt at all. Most patches never turn into anything serious, but some do, and that's why every one of them deserves a proper look.
Leukoplakia is a white patch in the mouth that can't be wiped off and isn't explained by another cause, like biting or thrush. It's usually painless and isn't contagious. Most leukoplakia never becomes cancer, but some patches contain precancerous cell changes, so a biopsy is how you know. Stop tobacco, fix anything that rubs, and see a dentist about any white patch lasting 2 to 3 weeks.
Not sure this is what you have? Answer five quick questions in our mouth spot checker. It compares what you see with more than 40 common conditions and tells you how soon to have it looked at.
- What leukoplakia looks like
- Types of leukoplakia
- Tongue, gums, and lips
- Leukoplakia vs. other white patches
- Oral hairy leukoplakia
- Erythroplakia
- What causes leukoplakia
- Symptoms
- Is leukoplakia cancerous?
- Does it go away?
- What you can do
- Why the biopsy matters
- Leukoplakia treatment
- Follow-up schedule
- What a dentist can do
- Prevention
- Special situations
- When to call us
- FAQ
What does leukoplakia look like?
Doctors define leukoplakia by what it isn't. It's a white patch that can't be wiped off and can't be explained by anything else, like cheek biting, a burn, a fungal infection, or lichen planus. That's why the name is really a starting point, not a final answer.
Typical features:
- White or gray, from thin and filmy to thick and leathery
- Usually flat, with a clear edge
- Smooth, wrinkled, or slightly rough to the tongue
- Painless in most cases
- Stays put. It doesn't move around from week to week the way geographic tongue does.
Types of leukoplakia
Leukoplakia is sorted by how it looks, because appearance gives a rough idea of risk. Non-homogeneous patches are about four times as likely to become cancer as homogeneous ones, according to a 2024 review of 55 studies.
| Type | What it looks like | Level of concern |
|---|---|---|
| Homogeneous | Evenly white, flat, thin, smooth or finely wrinkled | Lowest, but still needs a biopsy and follow-up |
| Non-homogeneous (speckled or nodular) | Uneven, with bumps, nodules, or red specks | Higher |
| Erythroleukoplakia | White patch mixed with red areas | High. Biopsy promptly. |
| Proliferative verrucous leukoplakia (PVL) | Warty, thick white patches that spread slowly to several sites, often the gums | Highest. Needs specialist care and close lifelong follow-up. |
Leukoplakia on the tongue, gums, and lips
Leukoplakia can show up anywhere in the mouth. The inside of the cheeks is a common spot. Where it sits makes a difference in how closely we watch it.
Leukoplakia on the tongue
Patches on the sides and underside of the tongue, and on the floor of the mouth beneath it, carry more risk than patches elsewhere. In a 2024 review, leukoplakia on the side of the tongue became cancer in about 12.7% of cases, roughly twice the average. White spots on the top of the tongue are more often a coating, thrush, or geographic tongue, though they still deserve a look if they won't scrape off.
Leukoplakia on the gums
White patches on the gums are often frictional, from aggressive brushing or a denture edge. But the gums are also the most common place for proliferative verrucous leukoplakia, which tends to affect older women, many of whom never smoked. Thick, warty patches on the gums that slowly spread need a specialist's eye.
Leukoplakia on the lips
A white patch on the inside of the lip is often linked to where someone holds a cigarette, cigar, or pipe, or to smokeless tobacco. On the outside of the lower lip, white or scaly roughness from years of sun is usually a related condition called actinic cheilitis. Both should be checked, and sun-damaged lips need SPF protection.
Leukoplakia vs. thrush, lichen planus, and other white patches
Most white patches in the mouth aren't leukoplakia. The first two questions we ask are: does it wipe off, and is something rubbing it?
| Leukoplakia | Oral thrush | Lichen planus | Frictional keratosis / linea alba | |
|---|---|---|---|---|
| Looks like | Flat or thick white patch with a clear edge | Creamy, cottage-cheese spots | Lacy white lines, sometimes with red or sore areas | Rough white area where something rubs, or a white line along the bite |
| Wipes off? | No | Yes, often leaving a red spot | No | No |
| Where | Anywhere, usually one area | Tongue, palate, cheeks, often widespread | Both cheeks, often matching sides | Cheek along the bite, tongue edge, gums near a denture or sharp tooth |
| Feels | Usually painless | Burning, bad taste | Sensitive to spicy foods, can be sore | Painless |
| Cause | Tobacco, alcohol, sometimes unknown | Candida yeast overgrowth | Immune reaction | Rubbing, cheek biting, sharp edges |
| Cancer risk | Small but real | None | Small | None |
| What to do | Biopsy and follow-up | Antifungal medicine | Diagnosis, symptom control, regular checks | Remove the cause, recheck in 2–3 weeks |
Read more about oral thrush and oral lichen planus. If you chew your cheeks or grind your teeth at night, that can cause frictional white patches too, and a night guard may help. See tooth grinding and bruxism.
Oral hairy leukoplakia is a different condition
Despite the similar name, oral hairy leukoplakia isn't the same thing and isn't considered precancerous. It's caused by the Epstein-Barr virus (EBV), the same virus behind mono, which most adults carry quietly for life.
- What it looks like: white, ridged or "hairy" folds running up and down the sides of the tongue, often on both sides. It doesn't wipe off.
- Who gets it: mainly people with a weakened immune system, such as from HIV, an organ transplant, or immune-suppressing medicines. It occasionally shows up in people on steroid inhalers or in otherwise healthy people.
- Why it matters: it can be the first clue that the immune system is under strain. If we see it in someone without a known reason, we'll talk with you and your physician about checking for an underlying cause, including HIV testing.
- Treatment: it usually doesn't need treatment on its own. Treating the underlying condition often clears it, and antiviral medicine is sometimes used.
Erythroplakia: the red patch to take seriously
Erythroplakia is leukoplakia's red counterpart: a red, velvety patch that can't be explained by anything else. It's much less common than leukoplakia, but much more likely to be a problem. In a large 2020 review, about 33% of erythroplakia cases became cancer, and many already show severe precancerous changes or early cancer when they're first biopsied. A red patch in the mouth that lasts more than 2 weeks, with no obvious cause, should be biopsied without waiting. Our page on signs of oral cancer covers the other changes worth knowing.
What causes leukoplakia?
Leukoplakia is the lining of the mouth thickening in response to long-term irritation. The usual causes:
- Tobacco, by far the biggest one. Smoking and smokeless tobacco both cause it. Dip and chew often cause patches right where they're held.
- Alcohol, especially heavy drinking, and especially combined with tobacco
- Betel quid or areca nut chewing
- No obvious cause. Some people, especially those with PVL, have never smoked or drunk heavily. This is called idiopathic leukoplakia, and it tends to carry more risk, not less.
Chronic rubbing from a sharp tooth, rough filling, or ill-fitting denture causes white patches too. Strictly speaking, once a white patch has a clear cause like friction, it's called frictional keratosis rather than leukoplakia. In practice, we treat the friction first and see whether the patch fades.
Leukoplakia symptoms
Most of the time there are none. People notice:
- A white or gray patch they can see in the mirror
- A rough, dry, or "different" feel when the tongue runs over it
- Rarely, mild sensitivity to hot or spicy foods
Pain, bleeding, a lump, an open sore inside the patch, or red areas mixed in are not typical of plain leukoplakia. Those changes need to be seen soon.
Is leukoplakia cancerous?
Leukoplakia itself isn't cancer. It's classed as an oral potentially malignant disorder, which means it carries a higher chance than normal tissue of turning into cancer over time. Here's what large reviews of the research have found:
- Overall, about 6.6% of leukoplakias became cancer in a 2024 review of 55 studies and more than 41,000 patients. A 2020 review put it at about 9.5%. So roughly 7 to 10 out of 100, over years of follow-up.
- That means most leukoplakias, more than 9 in 10, never become cancer.
- Risk is higher for non-homogeneous patches, larger patches, patches on the side of the tongue, people who smoke, and patches that show dysplasia on biopsy.
- Erythroplakia became cancer in about 33% of cases, and proliferative verrucous leukoplakia in about 49.5%, in a 2020 review.
These are averages from many studies. Your own risk depends on what your patch looks like, where it is, and what the biopsy shows.
Does leukoplakia go away?
Sometimes. Patches caused mostly by tobacco can shrink or disappear after someone quits, often over weeks to months. Frictional patches usually fade within a couple of weeks once the rubbing stops. Many leukoplakias, though, stay the same for years, and a few slowly change. Even when a patch fades or is removed, follow-up visits continue, because new patches can form and some come back.
What you can do about leukoplakia
There's no cream, rinse, or supplement that reliably makes leukoplakia go away. These steps make the biggest difference:
- Stop tobacco in every form. This is the single most helpful thing you can do. Ask us or your physician about nicotine replacement and quit programs.
- Cut back on alcohol, and avoid alcohol-heavy mouthwash if your patch is sensitive.
- Stop the rubbing. Have a sharp tooth, broken filling, or loose denture fixed. Try not to chew your cheek or play with the patch with your tongue.
- Don't try to scrape it off. Leukoplakia is part of the lining, not a coating. Scraping only irritates it.
- Take a photo in good light with a ruler or coin for scale, so changes are easier to spot.
- Keep every follow-up visit, even if the patch doesn't bother you.
Why the biopsy matters
Two patches that look identical can be completely different under the microscope. A biopsy, removing a small piece of the patch after numbing it, lets a pathologist see whether the cells show dysplasia, which means abnormal growth that could lead to cancer. Special lights and rinses can't replace this step.
| Biopsy result | What it means | What usually happens next |
|---|---|---|
| Hyperkeratosis, no dysplasia | Thickened lining with normal-looking cells | Remove causes and monitor. It still needs regular checks. |
| Mild dysplasia | Early abnormal changes in the lower layer of cells | Closer monitoring. Removal is often considered, especially in high-risk spots. |
| Moderate or severe dysplasia | More advanced changes through more of the lining | Removal by a specialist is usually recommended, then close follow-up |
| Carcinoma in situ or cancer | Cancer cells are present | Prompt referral to a head and neck cancer team |
In one large review, moderate or severe dysplasia had about 2.4 times the odds of becoming cancer compared with mild dysplasia. Large or varied patches sometimes need more than one biopsy site, because changes can differ within the same patch.
Leukoplakia treatment options
Treatment depends on the biopsy, the location, the size, and your health. There's no single right answer, and it's often a shared decision with a specialist.
| Option | What it involves | Things to know |
|---|---|---|
| Remove the cause | Quit tobacco, limit alcohol, fix rubbing teeth or dentures | First step for everyone. Some patches shrink or clear. |
| Watch and recheck | Regular exams with photos, and repeat biopsy if it changes | Common for small, low-risk patches without dysplasia |
| Surgical removal | A specialist cuts out the patch under local anesthesia | Gives the pathologist the whole patch to examine |
| Laser removal | A specialist removes or vaporizes the patch with a laser | In a 2024 review, laser-based methods had fewer recurrences than other techniques |
| Other methods | Cryotherapy or photodynamic therapy in some centers | Less common, and used case by case |
Removing a patch lowers concern but doesn't end follow-up. In that same 2024 review, leukoplakia came back after surgery in about 22% of cases overall, so checkups continue.
Leukoplakia follow-up schedule
There's no single schedule every expert agrees on. It depends on the type, the site, and the biopsy. A typical pattern looks like this:
- After removing a possible cause: recheck in 2 to 3 weeks. Still there means biopsy.
- No dysplasia: often every 6 to 12 months, sooner if it changes.
- Mild dysplasia, or a patch in a higher-risk spot: often every 3 to 6 months.
- After removal of moderate or severe dysplasia: close visits, often every few months for the first couple of years, then spaced out.
- PVL: frequent specialist visits, usually for life.
Between visits, call us if the patch gets thicker or bumpy, turns red, opens into a sore, bleeds, or starts to hurt.
What a dentist can do for leukoplakia
- Figure out what the white patch actually is. We check whether it wipes off, look for a source of friction, and look at the rest of your mouth for patterns that suggest lichen planus or thrush. This is a regular part of your dental exam and our oral cancer screening.
- Remove the obvious causes. Smooth a sharp tooth, replace a rough filling, or adjust or reline a denture, then recheck.
- Photograph and measure the patch so changes are easy to compare.
- Biopsy, or refer you for one. Dr. Henley does much of this work through our oral medicine diagnosis service.
- Coordinate with specialists. When a patch needs removal, laser treatment, or close monitoring, we work with oral surgeons, oral medicine specialists, and ENTs and stay involved in your follow-up.
- Help you quit tobacco with practical support and referrals.
How to prevent leukoplakia
- Don't use tobacco, including dip, chew, cigars, and pipes
- Keep alcohol moderate
- Get sharp teeth, broken fillings, and poorly fitting dentures fixed
- Use SPF lip balm outdoors to protect your lower lip
- See your dentist regularly, and check your mouth once a month
Special situations
Smokeless tobacco users
White, wrinkled patches where dip or chew is held are common. They often improve after quitting. If a patch is still there a few weeks after you stop, or if it's thick, red, or rough, it needs a biopsy.
Denture wearers
Denture edges can cause frictional white patches. We'll adjust the denture and recheck. A patch that stays after the denture fits well should be biopsied.
People with weakened immune systems
White patches on the sides of the tongue may be oral hairy leukoplakia or thrush rather than true leukoplakia. We coordinate with your physician, and we see many patients like this as part of our care for medically complex patients.
People who have had head and neck cancer
New patches after cancer treatment need careful attention and should be shared with your cancer team. See our page on dental care for head and neck cancer.
When to see a dentist about a white patch
Make an appointment if:
- You have a white patch that doesn't wipe off
- A white patch is still there 2 to 3 weeks after you've fixed a possible cause
- You use tobacco and notice a patch where you hold it
- You've had leukoplakia before and notice a new patch
- A patch you already know about looks thicker or larger
Get care quickly if:
- The patch is red, or white with red areas
- It turns bumpy, warty, or hard
- It opens into a sore, bleeds, or starts to hurt
- You have a lump in your neck, numbness, or trouble swallowing
Leukoplakia FAQ
What is leukoplakia?
Leukoplakia is a white patch inside the mouth that can't be wiped off and can't be explained by another condition, like thrush, cheek biting, or lichen planus. It's most often linked to tobacco and alcohol, but sometimes there's no clear cause. It isn't cancer, but it carries a small risk of becoming cancer over time, so it's biopsied and followed.
Is leukoplakia cancerous?
Leukoplakia is not cancer, but it is considered potentially precancerous. Large reviews have found that about 7 to 10 out of 100 leukoplakias become cancer over years of follow-up, which means most never do. Red areas, a bumpy surface, a location on the side of the tongue, smoking, and dysplasia on biopsy all raise the risk.
What does leukoplakia look like?
Leukoplakia usually looks like a flat white or gray patch with a clear edge. It can be thin and smooth, or thick, wrinkled, and rough. Some patches have bumps or red specks, which are more concerning. It doesn't rub off and usually doesn't hurt.
Does leukoplakia go away?
Sometimes. Patches linked to tobacco can shrink or disappear after quitting, and frictional patches fade once the rubbing stops. Many leukoplakias stay the same for years, and some come back after removal. Regular follow-up continues either way.
Can leukoplakia be scraped off?
No. That's one of the ways it's told apart from thrush, which usually wipes off with gauze. Leukoplakia is a thickening of the mouth's lining itself. Trying to scrape it off at home just irritates the tissue.
How do you get rid of leukoplakia?
Start by stopping tobacco, cutting back on alcohol, and fixing anything that rubs the spot. After a biopsy, a patch with no dysplasia may simply be watched. Patches with more concerning changes are usually removed by a specialist with surgery or a laser. No cream or supplement reliably clears leukoplakia.
What causes leukoplakia?
Tobacco is the most common cause, including cigarettes, cigars, pipes, and smokeless tobacco. Heavy alcohol use and betel quid chewing also contribute. Some people develop leukoplakia without any known cause. White patches from friction against a tooth or denture are similar but are technically called frictional keratosis.
What is oral hairy leukoplakia?
Oral hairy leukoplakia is a white, ridged patch on the sides of the tongue caused by the Epstein-Barr virus. It mostly affects people with weakened immune systems, such as from HIV or organ transplant medicines. Unlike regular leukoplakia, it isn't considered precancerous. It can be a sign that the immune system needs to be checked.
What's the difference between leukoplakia and erythroplakia?
Leukoplakia is white and erythroplakia is red. Erythroplakia is much less common but much more likely to contain severe precancerous changes or early cancer. Any red patch in the mouth that doesn't heal within about 2 weeks should be biopsied promptly.
Is leukoplakia contagious?
No. Regular leukoplakia can't be passed to anyone through kissing or sharing food or drinks. Oral hairy leukoplakia is caused by the Epstein-Barr virus, which most adults already carry, and the patch itself isn't considered contagious in the usual sense.
What are white spots on the tongue?
Most white spots on the tongue are a harmless coating, oral thrush, geographic tongue, or irritated taste buds. A white patch that won't scrape off, especially on the side or underside of the tongue, could be leukoplakia and should be examined. White ridges on the sides of the tongue can be oral hairy leukoplakia.
How often should leukoplakia be checked?
It depends on the biopsy and location. Low-risk patches without dysplasia are often checked every 6 to 12 months, while patches with dysplasia or in higher-risk spots are often checked every 3 to 6 months. Proliferative verrucous leukoplakia usually needs frequent specialist visits for life. Your dentist or specialist will set a schedule for you.
Have a white patch that won't go away?
If you're in the Jacksonville area and you've noticed a white or red patch that doesn't rub off, we're glad to look at it, talk you through what we see, and arrange a biopsy if it needs one. Most patches turn out to be low risk, and knowing for sure takes a lot of worry off the table.
Related conditions
Sources
- Warnakulasuriya S, et al. Oral potentially malignant disorders: a consensus report from an international seminar on nomenclature and classification, convened by the WHO Collaborating Centre for Oral Cancer. Oral Dis. 2021;27(8):1862–1880.
- Pimenta-Barros LA, et al. Malignant transformation of oral leukoplakia: systematic review and comprehensive meta-analysis. Oral Dis. 2025;31(1):69–80.
- Iocca O, et al. Potentially malignant disorders of the oral cavity and oral dysplasia: a systematic review and meta-analysis of malignant transformation rate by subtype. Head Neck. 2020;42(3):539–555.
- Mello FW, et al. Prevalence of oral potentially malignant disorders: a systematic review and meta-analysis. J Oral Pathol Med. 2018;47(7):633–640.
- Bhattarai BP, et al. Recurrence in oral leukoplakia: a systematic review and meta-analysis. J Dent Res. 2024;103(11):1066–1075.
- Wu YH, Chiang CP. Oral hairy leukoplakia: the role of Epstein-Barr virus, the occurrence in immunocompetent patients, and the malignant transformation potential. J Dent Sci. 2025;20(3):1398–1405.
This page is for general education and isn't a diagnosis. Every mouth is different. If you have a sore you're worried about, see your dentist or physician. Photos marked Wikimedia Commons are used under their listed licenses and may have been cropped or resized.