Sensitive-Teeth Toothpaste: From Checking Ingredients to the Amount to Use and When to See a Dentist

Sensitive-teeth toothpaste is a quasi-drug toothpaste containing an active ingredient that eases sensitive symptoms, and the Korea Disease Control and Prevention Agency (KDCA) explains that it can reduce the discomfort of mild dentin hypersensitivity to some extent. When choosing, check on the package for the quasi-drug mark and whether the indications state relief of sensitive teeth, and use about 1/2 to 1/3 of the bristle length steadily as directed. If your teeth stay sensitive or get worse despite using it, there may be a cause that toothpaste cannot solve, and dental care is needed.

Published 2026-11-08 · Updated 2026-11-08 · DentalStatics editorial team

Key facts

Expected effect	Toothpaste made for sensitive teeth can reduce the discomfort of dentin hypersensitivity to some extent, and if sensitivity continues, dental care is needed (source: Korea Disease Control and Prevention Agency (KDCA) National Health Information Portal)
Example of an active ingredient	There are quasi-drug toothpastes whose approval information lists potassium nitrate as the active ingredient and prevention and relief of sensitive teeth as the indication (source: Ministry of Food and Drug Safety (MFDS, 식품의약품안전처) Drug Safety Nara)
What to check when buying	The quasi-drug wording on the container or package, indications, dosage and administration, and precautions for use (source: Ministry of Food and Drug Safety)
Amount per use	1/2 to 1/3 of the bristle length; a pea-sized amount for children aged 6 and under (source: Ministry of Food and Drug Safety)
If you also want cavity prevention	Toothpaste containing 1,000ppm or more of fluoride is recommended (source: Ministry of Food and Drug Safety)

How does sensitive-teeth toothpaste reduce sensitivity?

Sensitive-teeth toothpaste contains an active ingredient that eases sensitive symptoms. In the approval information of the Ministry of Food and Drug Safety's Drug Safety Nara, there are products that contain potassium nitrate as the active ingredient and state prevention and relief of sensitive teeth as the indication, and the same product may also contain fluoride for cavity prevention and abrasive ingredients for plaque removal.

These ingredients work to reduce stimuli passing to the exposed dentin, so it is usual to use the product steadily as directed rather than judging the effect after one or two uses. Ingredients and amounts differ by product, so even among sensitive-teeth toothpastes, compare the active ingredient table on the back of the package when choosing.

Sensitive-teeth toothpaste is a means of easing the sensation of sensitivity. It cannot refill a worn-away tooth neck or fix cavities and cracked teeth.

How should you choose sensitive-teeth toothpaste?

When buying toothpaste, the MFDS advises checking whether the container or package carries the wording quasi-drug and checking the indications, dosage and administration, and precautions. If the goal is sensitive symptoms, the first criterion is whether the indications column states prevention or relief of sensitive teeth.

If you tend to get cavities, a product containing 1,000ppm or more of fluoride is recommended. People whose gums often swell may choose a product that also contains an ingredient for preventing gum disease. Some products state age limits for children, so if the toothpaste will be shared by the family, be sure to read the precautions column.

How should you use sensitive-teeth toothpaste?

By the MFDS standard, about 1/2 to 1/3 of the bristle length is the right amount per use, and it is better to brush right away without wetting the brush. Using a lot does not reduce sensitivity faster, and you should rinse your mouth thoroughly after use.

The sensitive area is often the neck of the tooth where tooth meets gum, so do not skip that spot, but brush with short, gentle strokes instead of scrubbing hard. Pressing hard to get the toothpaste to work can instead advance wear at the tooth neck and enlarge the cause of the sensitivity.

For the number of uses per day, follow the product's dosage and administration, and it is good to use it at the brushing before bed without fail. To check the effect of sensitive-teeth toothpaste, it is easier to judge if you use the same product without switching for a certain period.

What if sensitive-teeth toothpaste does not cure it?

The precautions of sensitive-teeth toothpastes approved by the MFDS include wording that if sensitive symptoms persist or worsen, you should consult a dentist. The KDCA also advises visiting the dentist if teeth stay sensitive despite using sensitive-teeth toothpaste.

If an irritation reaction occurs after use, such as a stinging mouth or swelling of the lips and face, stop using it right away and consult a doctor, dentist or pharmacist.

When you go for treatment, it helps to tell the dentist which sensitive-teeth toothpaste you used, for how long, and how many times a day. Based on this information, the dentist decides whether to continue toothpaste care alone or move on to an applied treatment such as fluoride varnish or a resin filling. If the toothpaste has reduced symptoms somewhat, it is also possible to maintain that state while adding dental treatment.

In which cases is sensitivity not solved by toothpaste alone?

In cases like those below, sensitivity decreases only if the cause is treated, rather than by switching toothpastes and putting up with it. When toothpaste temporarily masks the sensitivity, a cavity or crack may advance in the meantime, so if you have started using sensitive-teeth toothpaste, be sure to mention it at your next checkup.

The tooth neck is notched so deeply that a fingernail catches
A cavity or cracked tooth is the cause of the sensitivity
The gums keep receding because of gum disease
It hurts on its own without cold stimulus, or the pain is severe at night
The edge of a filling or crown has opened

Common myths and facts

Myth: If you use sensitive-teeth toothpaste for a long time, a notched tooth will fill in again

Sensitive-teeth toothpaste only eases the sensation of sensitivity and does not restore worn-away tooth. A deep notch is considered for treatment by filling at the dentist.

Myth: If you squeeze out plenty of toothpaste, sensitivity decreases faster

The MFDS recommends 1/2 to 1/3 of the bristle length. Using it steadily as directed matters more than increasing the amount.

Myth: If you use sensitive-teeth toothpaste, no other treatment is needed

If cavities, cracks or gum disease are the cause, toothpaste cannot solve it. If teeth stay sensitive despite using it, the cause must be checked at the dentist.

Frequently asked questions

Can children also use sensitive-teeth toothpaste?

Age precautions differ by product, so check the package first. Some products say to consult a doctor, dentist or pharmacist before use for those under 12, and for children aged 6 and under only a pea-sized amount is used, with a guardian watching so the child does not swallow it.

Do I have to use sensitive-teeth toothpaste for life?

If the cause is resolved and the sensitivity goes away, you may return to regular fluoride toothpaste. People whose cause remains sometimes continue it for symptom management, so decide by looking at the condition at regular checkups. After treating the cause with a resin filling or gum treatment, choose toothpaste while watching whether sensitivity returns.

Does it work if I alternate with regular toothpaste?

You can alternate, but it becomes hard to judge the effect. If the goal is to reduce sensitivity, it is better for a while to use sensitive-teeth toothpaste steadily as directed.

Does sensitive-teeth toothpaste also contain fluoride?

Many products contain fluoride as well, but the amount differs by product. Check the fluoride content on the package, and if you tend to get cavities, choose a product with 1,000ppm or more.

If it doesn't work, can I just switch to a different sensitive-teeth toothpaste?

You can try a product with different ingredients, but if sensitivity stays the same despite steady use, the problem is probably not the toothpaste. Rather than spending time switching products many times, it is better to first have the cause of the sensitivity checked at the dentist.

References

Korean version →