My Back Teeth Keep Biting My Cheek (Why Am I Always Biting the Inside of My Mouth?)

Accidentally biting the inside of your cheek is irritating and can be painful mainly if it keeps happening repeatedly. If you have a recurring cheek-biting problem with your back teeth, it might be worth seeing a dentist to see if the issue can be corrected.

Biting the inside of your cheek is something almost everyone experiences from time to time. But when it becomes a chronic cheek biting pattern—also known as morsicatio buccarum—it can cause persistent irritation, painful sores, and even long-term injury to the oral mucosa that may require proper care similar to steps explained in How to Heal a Cut in Your Mouth Overnight.

According to the International Classification of Sleep Disorders (ICSD-R), 85 to 90% of the general population grind their teeth at some point during their life, though only 5% will develop a serious clinical condition.

Understanding the causes, the potential consequences, and the treatment options can help break such a cycle and protect your oral health.

Why Do I Keep Biting My Cheek with My Back Teeth?

“My back teeth keep biting my teeth. Why is this happening to me”? First, take a deep breath and try to stay calm. Stressing out will only exacerbate the issue.

As to why it is happening, you might find the answer below.

Misalignment

One of the most common reasons for repeated cheek biting is a teeth or jaw misalignment. Malocclusion condition means the upper and lower teeth aren’t resting together correctly. 

A malocclusion makes it more likely for your teeth to catch the inside of your cheek when you bite down. According to the American Association of Orthodontists, crossbites are among the most common forms of malocclusion. Wisdom teeth can also push your teeth out of alignment as they grow in, resulting in the same problems as a crossbite or misaligned jaw.

Fast or Careless Chewing

If you tend to eat fast mainly while focusing on another task, you are more likely to be careless about where you’re putting your teeth. This makes it more likely for you to bite the inside of your cheek while chewing. You can also run into trouble if you tend to favor one side of your mouth more than the other while chewing.

Ill-Fitting Dental Devices

Braces and retainers are meant to resolve dental issues, but if they are not sized properly, they can cause a whole new set of problems. Poorly fitted dental devices can cause teeth to misalign, making it more likely that you will accidentally bite your cheek.

Stress

If you ask, “My back teeth keep biting my cheek – what’s going on?” you should also ask yourself “Am I more stressed out than usual?” Biting the inside of your cheek can be a conscious or unconscious coping mechanism for stress and anxiety. Repetitive cheek biting creates a raised ridge along the inside of the cheek, making it more likely that you will accidentally bite yourself while chewing.

The Psychology Behind Chronic Cheek Biting

Research suggests that compulsive cheek biting often develops as a subconscious coping mechanism in response to stress, anxiety, boredom, or mental overload. Understanding the psychology behind cheek biting helps explain why this behavior can become repetitive even when there is no clear structural dental cause. Because the action can briefly reduce internal tension, the brain begins to associate cheek chewing with relief. Over time, this creates a reinforcement loop in which the behavior becomes automatic and self-sustaining—even when the original trigger is no longer present. This is why many people report that they continue biting the inside of their cheek without realizing they are doing it.

Fatigue and prolonged concentration can also increase the likelihood of accidental or habitual cheek biting. Activities such as working at a computer for long periods, studying, driving, or scrolling on a phone reduce awareness of jaw movement and increase muscle tension in the face. In these situations, the cheek can easily become trapped between the teeth, especially if minor bite irregularities are already present. As a result, repeated biting inside of cheek tissue may occur during everyday activities such as chewing or speaking.

In some individuals, chronic cheek biting may be associated with anxiety-related behaviors described in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) under obsessive-compulsive and related conditions. Although most cases are mild and manageable, persistent cheek chewing that leads to repeated tissue injury, soreness, or difficulty stopping the habit may benefit from professional evaluation and habit-focused treatment strategies.

Understanding these psychological triggers helps patients recognize that biting the inside of your cheek is not always simply accidental. Identifying stress patterns, attention-related triggers, or emotional tension can make treatment approaches such as habit reversal training (HRT), cognitive behavioral therapy (CBT), and stress-management techniques significantly more effective in breaking the cycle and protecting long-term oral health.

My Back Teeth Keep Biting My Cheek. What Can I Do? 

To stop repeated cheek biting by back teeth, you will likely need a dentist to evaluate what is happening inside your mouth.

The following treatments and home remedies may help provide relief:

• Rinsing your mouth with a saltwater gargle to reduce inflammation
• Taking over-the-counter pain relief medication
• Talking to a doctor psychologist about ways to reduce stress
• Wearing a mouthguard while you sleep

If you’re dealing with soreness or injury from repeated cheek biting, understanding how to heal a cut in your mouth can also help speed up recovery and reduce discomfort.

Inner Cheek Bite Treatment Options That Actually Work

If you keep biting inside of cheek tissue—especially near your back teeth—the most effective solution depends on what is causing the problem in the first place. In many cases, repeated cheek biting is not random. Instead, it usually happens because of subtle bite alignment changes, irritation from dental appliances, or repeated swelling in the same area that makes the tissue easier to catch again while chewing.

When biting is behavioral or psychologically related, the most effective treatments involve habit-change techniques. Evidence-based methods include cognitive behavioral therapy (CBT) and habit reversal training (HRT), which have been shown to significantly reduce BFRBs. Stress management techniques, deep breathing, and relaxation exercises are also used to ease change.

A dentist can evaluate how your back teeth come together and determine whether the issue is structural, behavioral, or a combination of both. Identifying the cause early helps prevent irritation from becoming a long-term habit that continues even after the original trigger disappears.

How Dentists Treat Repeated Cheek Biting Near Back Teeth

Professional inner cheek bite treatment often focuses on reducing the chance of soft tissue getting trapped between the teeth during everyday activities like chewing or speaking. Depending on the diagnosis, treatment may involve small adjustments rather than major procedures.

For example, your dentist may:

• smooth sharp edges on restorations or enamel surfaces
• adjust how upper and lower teeth meet when you bite
• evaluate whether wisdom teeth are shifting your bite position
• recommend a custom night guard if grinding is contributing to the problem

These types of targeted corrections are especially helpful when patients notice they keep biting cheek tissue in the same location repeatedly.

Is Your Cheek Biting Structural or Behavioral?

Because biting the inside of your mouth can develop for different reasons, identifying whether the cause is structural or behavioral is an important first step toward choosing the right treatment approach. Some patients experience cheek biting due to changes in bite alignment, while others notice the habit during periods of stress or reduced attention. The comparison below highlights the most common causes and what they may indicate.

Practical Daily Adjustments That Reduce Repeat Cheek Biting

Even small behavior changes can make a noticeable difference while the cheek heals. Patients who frequently keep biting inside of cheek tissue during meals often benefit from slowing their chewing pace and becoming more aware of how their back teeth meet.

Helpful adjustments include:

• chewing evenly on both sides of the mouth
• avoiding multitasking while eating
• choosing softer foods until irritation improves
• staying hydrated to support oral tissue recovery

These strategies reduce mechanical pressure on the injured area and support healing between dental visits.

Risks and Consequences of Habitual Cheek Biting

Occasional cheek biting is usually harmless, but habitual cheek biting can lead to recurrent canker sores, chronic irritation of oral tissues, thickened or white patches on the mucous membrane, and local infection risk due to repeated trauma. Additionally, patients may experience difficulty chewing, speaking, or engaging in social activity. In severe cases, long-term tissue damage can occur.

If cheek biting becomes persistent, interferes with eating, or causes physical damage, seeking professional evaluation is essential to prevent further complications.

Common Causes of Repeated Back Teeth Cheek Biting and Their Treatment

If you keep biting inside of cheek tissue near your back teeth, the cause is often related to how the molars meet during chewing. The table below shows common reasons and the most appropriate inner cheek bite treatment options based on each situation.

Final Thoughts

It may seem like a small thing, but repeatedly biting the inside of your mouth can put a severe damper on your day and it is not something you should have to live with. Make an appointment with a professional dentist and tell them, “My back teeth keep biting my cheek”. They will be able to diagnose what is causing the problem and offer a detailed treatment plan to correct it.

FAQ About Biting Your Cheek