10 Biggest Causes of Tooth Sensitivity
Are your teeth tender? From acidic foods to certain toothpastes, a number of culprits could be to blame.
Tooth sensitivity usually means dentin, the softer layer under the enamel, has been exposed. Gum recession, worn enamel, decay, a cracked tooth or a worn filling are the most common reasons, and recent dental work or whitening can cause it temporarily. A short zing with cold that fades quickly is often from exposed dentin. Sensitivity that lingers or centers on one tooth should be checked.
What can cause tooth sensitivity?
Ten possibilities to discuss with your dentist include:
Exposed roots from gum recession
Loss of enamel from wear
Brushing too forcefully
Acid from food, drinks or reflux
Tooth decay
A cracked tooth
A worn or damaged filling
Gum disease
Recent restorative treatment
Recent whitening
These are possibilities, not a diagnosis or a ranking of which cause is most likely for you. Tell the dentist whether one tooth or several are affected and whether the discomfort stops quickly or lingers. Our guide to why a tooth hurts explains what those patterns tend to mean.
Can certain foods make it worse?
Yes. Acidic, sugary, very cold and very hot foods are the usual triggers, and acidic foods can wear enamel over time. Our post on foods to avoid with sensitive teeth covers the common ones and how to enjoy them with less discomfort.
Can toothpaste help?
Desensitizing toothpaste can help some forms of sensitivity, but it does not repair a crack or cavity. Use it as directed and discuss persistent symptoms. Our toothpaste guide explains how to compare products.
What if the sensitivity began after a filling?
Recent treatment belongs in the history. Read our guide to pain after a filling and contact the treating dentist if the symptoms worsen, linger or occur when you bite. Do not assume every new symptom is part of normal healing.
What if I also grind my teeth?
Mention clenching, morning jaw discomfort and changes in your bite at the appointment. Our bruxism information explains how tooth wear and jaw symptoms are evaluated. A night guard does not take the place of finding the cause of a painful tooth.
When should I have sensitive teeth checked?
Arrange an examination for recurring sensitivity, a single painful tooth or discomfort that interferes with eating. Review emergency dental care if pain is severe or comes with swelling.
Discuss sensitive teeth in Jacksonville
Call CJ Henley, DMD at 904-398-1549 or contact us. Bring the names of products you use and explain when the symptoms started. A comprehensive dental examination can connect the symptom pattern with the condition of the teeth and restorations.
Sources
American Dental Association, MouthHealthy. Sensitive teeth. Accessed October 6, 2026.
Cunha-Cruz J, Wataha JC, Heaton LJ, et al. The prevalence of dentin hypersensitivity in general dental practices in the northwest United States. J Am Dent Assoc. 2013;144(3):288-296. doi:10.14219/jada.archive.2013.0116 (retrieved via PubMed)
About the author. CJ Henley, DMD, is a general dentist in Jacksonville whose practice focuses on cosmetic and restorative dentistry, dental implants and dental care around head and neck cancer. Meet Dr. Henley.
CJ Henley, DMD, PA · 3675 Hendricks Avenue, Jacksonville, FL 32207 · 904-398-1549
Updated October 2026.
8 Foods to Avoid If You Have Sensitive Teeth
Leaving certain foods off of your menu — think hot, cold, sugary, sticky, and acidic — may help ease tooth sensitivity.
If your teeth are sensitive, the foods most likely to cause trouble are acidic, sugary, very cold or very hot, and hard. Acidic foods and drinks also wear enamel over time, which can make sensitivity worse. You don't have to give these foods up entirely. Having them with meals, rinsing with water afterward and waiting before you brush all help. If one tooth hurts more than the rest, have it checked, because food sensitivity can also be a sign of a cavity or crack.
Why do some foods make sensitive teeth hurt?
Under the enamel is a softer layer called dentin, which is full of tiny fluid-filled channels leading to the nerve. When enamel wears thin or gums pull back from the root, dentin is exposed. Cold, heat, sugar and acid then move the fluid in those channels and trigger a quick, sharp pain. [1] In a 2013 study of 787 adults at general dental practices in the northwest United States, about one in eight had this kind of sensitivity. It was more common in younger adults, women, and people with gum recession or who had whitened their teeth at home. [3] Our post on the causes of tooth sensitivity explains the reasons in more detail.
Which foods and drinks are most likely to trigger sensitivity?
1. Soda and sports drinks
Regular soda combines sugar and acid. Diet soda still has acid. Sports drinks and energy drinks are often just as acidic. Sipping them over an hour bathes your teeth in acid the whole time. [2]
2. Citrus fruit and juice
Lemons, limes, grapefruit, oranges and pineapple are acidic, and so are their juices. Whole fruit with a meal is easier on teeth than juice sipped through the day or lemon water first thing every morning.
3. Tomatoes and tomato sauce
Tomatoes are nutritious and acidic. Eating them as part of a meal, rather than alone, gives saliva a better chance to neutralize the acid.
4. Ice cream and frozen treats
Cold is the most common trigger for sensitive teeth, and ice cream adds sugar. Letting it soften a little, or eating it off the front of a spoon, can help.
5. Hot coffee and tea
Heat can trigger the same sharp pain as cold. Letting the drink cool slightly helps. Adding sugar and sipping all morning adds acid exposure as well.
6. Hard candy
Lollipops, mints and other hard candy keep sugar in your mouth for a long time, and biting down on them can chip a tooth or a filling.
7. Sticky candy and dried fruit
Caramel, toffee, gummies and raisins cling to teeth and keep feeding plaque bacteria long after you've finished. Dried fruit is also acidic. [2]
8. Ice
Chewing ice combines cold with hard biting forces. It can crack teeth and fillings, sensitive or not.
How can I enjoy acidic foods with less sensitivity?
Have acidic foods and drinks with meals instead of on their own.
Drink acidic drinks rather than sipping them for hours, and use a straw if it helps.
Rinse with water afterward, or have some cheese or milk to help neutralize acid.
Wait about an hour after acidic food or drink before you brush, so softened enamel can reharden. [2]
Brush gently with a soft brush. Our post on brushing too hard explains why.
Try a desensitizing toothpaste. It helps many people with sensitivity from exposed dentin, used every day for a few weeks. See our toothpaste guide.
When is sensitivity more than a food problem?
See a dentist if sensitivity lasts more than a few weeks, centers on one tooth, lingers after the cold or heat is gone, or comes with pain on biting. Those patterns suggest a cavity, a crack, a leaking filling or an inflamed nerve, and avoiding foods won't fix them. Our guide to why a tooth hurts explains what each pattern tends to mean.
Where can I have sensitive teeth checked in Jacksonville?
Call our office at 904-398-1549 or contact us. Bring a list of the foods and drinks that set it off and the toothpaste you use. A comprehensive dental examination can find the cause, and once we know it, we can recommend treatments such as fluoride varnish, bonding over an exposed root or a filling.
Sources
American Dental Association, MouthHealthy. Sensitive teeth. Accessed October 6, 2026.
American Dental Association, MouthHealthy. Dietary acids and your teeth. Accessed October 6, 2026.
Cunha-Cruz J, Wataha JC, Heaton LJ, et al. The prevalence of dentin hypersensitivity in general dental practices in the northwest United States. J Am Dent Assoc. 2013;144(3):288-296. doi:10.14219/jada.archive.2013.0116 (retrieved via PubMed)
About the author. CJ Henley, DMD, is a general dentist in Jacksonville whose practice focuses on cosmetic and restorative dentistry, dental implants and dental care around head and neck cancer. Meet Dr. Henley.
CJ Henley, DMD, PA · 3675 Hendricks Avenue, Jacksonville, FL 32207 · 904-398-1549
Updated October 2026.