Why Do My Teeth Hurt When I Eat Sweets?

Consuming sugary foods and beverages is a double threat for your teeth. Sweet substances can harm tooth structure, making teeth more susceptible to sensitivity.

Also, eating sugary items can trigger discomfort or pain in teeth that have already become sensitive.

When you frequently eat sweets and don’t keep up reliable oral care, further harm to teeth and gums can develop. Over time this can lead to teeth that react painfully not only to sugar but to other sensations like heat or cold.

Sweets to avoid

Eating and drinking sugary items can aggravate damaged or overly sensitive teeth.

Particularly problematic choices include:

• Hard candies and lozenges. Sucking on these keeps sugar in the mouth for extended periods, creating an acidic environment around teeth.
• Sticky or gummy confections. Gummy bears, sticky frostings, dried fruit, and honey adhere to teeth, giving bacteria prolonged time to act.
• Orange juice. It might not seem harmful, but orange juice is loaded with sugar and natural citric acid, which can further wear enamel.
• Carbonated soft drinks. Sodas and colas are not only high in sugar but also acidic.

Causes

Damage to teeth can make them more sensitive to sugar. Several factors contribute to this:

Enamel (dentin) loss

Sugary foods and drinks contain fermentable carbohydrates. When these carbs meet harmful oral bacteria, acid is created. If that acid isn’t rinsed away or brushed off, it leaches minerals from tooth enamel and causes erosion.

When enamel wears away, teeth become more exposed and reactive to stimuli.

Saliva has minerals that help replenish enamel, but frequent snacking on sweets like chocolate reduces the chances saliva has to restore lost minerals.

Tooth decay (cavities)

Bacteria that consume sugar form a sticky film called plaque on teeth and beneath the gumline.

The acids in plaque cause demineralization of enamel. Once enamel is breached, bacteria and acid can reach the softer dentin beneath.

Decay leads to cavities, which begin as small holes in enamel. If untreated, they expand and deepen. Sugary substances, acids, and bacteria can penetrate a cavity and trigger sudden, sharp pain.

Gingivitis (gum disease)

Plaque buildup can also cause gum disease. When plaque hardens into tartar, it irritates the gums, leading to:

• inflammation
• infection
• swelling
• bleeding

Sore, inflamed gum tissue can heighten tooth sensitivity by exposing tooth roots, which contain nerve endings.

Receding gums

Gums normally protect the tooth roots and underlying bone. With age, gums may pull back, revealing tooth roots.

Smoking and overly vigorous brushing can worsen gum recession.

Poor oral hygiene and gum disease are also major contributors.

Tooth-whitening treatments

Whitening products often use ingredients like hydrogen peroxide to lift stains.

To be effective, peroxide must penetrate the tooth and reach the dentin, which can temporarily increase tooth sensitivity.

How it feels

If your teeth are sensitive or damaged, sugary foods may produce various sensations in your mouth and face, such as:

• tingling
• dull aching
• sharp, stabbing pain
• referred discomfort in the sinuses, eyes, or along the side of the face

Optum Now is operated by RVO Health. By clicking on this link, we may receive a commission. Learn more.

Treatments

For mild sensitivity or early enamel erosion, switching to a toothpaste formulated for sensitive teeth can help.

Sensitivity toothpastes work by sealing the dentin tubules inside teeth. These microscopic channels run from beneath the enamel into the dentin layer.

Extensive enamel erosion may need dental bonding, in which a tooth-colored resin is applied to restore tooth structure.

Filling cavities significantly reduces sensitivity.

Gingivitis and periodontal disease are managed with deep cleaning and scaling, which removes plaque and tartar, along with possible antibiotics.

Receding gums can be treated with scaling and deep cleaning and sometimes topical antibiotics; severe cases may require surgical grafting.

Sensitivity after tooth whitening usually resolves on its own. Avoiding sweets and very hot or cold drinks for several days may be sufficient.

Using a toothpaste for sensitive teeth during recovery can also provide relief.

Prevention

Follow these steps to protect your teeth and reduce pain from sugary foods:

• Limit sugar intake to lower cavity risk.
• Consider quitting smoking, vaping, or chewing tobacco.
• Brush at least twice daily with a soft-bristled brush and fluoride toothpaste.
• Floss daily.
• Avoid alcohol-based mouthwashes when possible.
• Brush after meals that include sweets or starchy snacks like chips.
• If brushing after eating isn’t possible, chew sugarless gum as an alternative; it’s better than sucking on candies.
• Visit a dental professional twice a year for cleanings; dentists can spot tiny cavities you may not notice yet.

When to see a dentist

Make an appointment if:

• Tooth pain persists after a week of using sensitivity toothpaste. You might have an infection or a cavity needing care.
• Your gums are swollen, white, irritated, or bleeding.
• You’ve lost a filling.
• Any pain or unusual sensation concerns you or interferes with daily life.

The bottom line

Damaged or sensitive teeth can ache when exposed to sugary foods and drinks. Conditions such as enamel erosion and cavities increase tooth reactivity.

Maintaining good oral hygiene helps keep teeth healthy and less reactive to stimuli like sweets.

Sensitive teeth may also react painfully to hot or cold foods and beverages.