Cheek biting is one of the most common oral habits, affecting millions of people worldwide. Whether it happens accidentally while eating or becomes a repetitive, stress-driven behavior, chronic cheek biting can lead to soreness, tissue damage, and even long-term complications if left unchecked. Understanding why it happens and what you can do about it is the first step toward protecting the soft tissues inside your mouth.
What Causes Cheek Biting?
Cheek biting can be accidental or habitual. Accidental biting typically happens during meals, especially when eating quickly, talking while chewing, or consuming foods that require vigorous chewing. Misaligned teeth or a poorly fitting dental restoration can also increase the likelihood of accidentally catching the cheek tissue between your teeth.
Habitual or chronic cheek biting, sometimes referred to as morsicatio buccarum, is a body-focused repetitive behavior (BFRB) similar to nail biting or hair pulling. It is often triggered by stress, anxiety, boredom, or deep concentration. Many people who bite their cheeks habitually may not even realize they are doing it until they notice soreness or visible damage to the inner cheek lining.
In some cases, dental issues contribute to the problem. Wisdom teeth that have not fully erupted, crooked teeth, or an uneven bite can create situations where the cheek tissue gets pinched during normal jaw movements. If you suspect a dental alignment issue is contributing to your cheek biting, an evaluation with a dentist can help identify the cause. Treatments like Invisalign or other orthodontic solutions may correct the underlying alignment problem.
Signs and Symptoms
The inner lining of the cheek is delicate, and repeated biting can cause a range of noticeable symptoms. You may observe redness, swelling, or tenderness in the area where the biting occurs. Over time, the damaged tissue may develop a white, ragged, or peeling appearance as the body tries to heal itself repeatedly. Some people develop small sores or ulcers that can be painful, especially when eating spicy, acidic, or salty foods.
In chronic cases, the tissue may thicken and form a rough patch that you can feel with your tongue. While these changes are usually benign, any persistent sore or unusual growth inside the mouth should be evaluated by a dental professional to rule out other conditions.
Potential Complications
While occasional cheek biting is generally harmless, chronic biting can lead to more serious issues. Open sores create an entry point for bacteria, increasing the risk of oral infections. The constant cycle of injury and healing can cause scar tissue to build up, making the area more prone to being bitten again because the raised tissue protrudes into the path of the teeth.
Repeated trauma to the oral mucosa has also been associated with an increased risk of developing oral lesions. Although the link between chronic cheek biting and oral cancer is not firmly established, dentists recommend monitoring any area of persistent irritation. Regular dental checkups include an oral cancer screening that can catch any concerning changes early.
How to Stop Cheek Biting
Breaking a cheek biting habit requires a combination of awareness and strategy. Here are several approaches that can help:
- Identify your triggers: Pay attention to when the biting occurs. Is it during stressful meetings, while scrolling on your phone, or when you are deep in thought? Recognizing the pattern is the first step to interrupting it.
- Practice mindfulness: Techniques like deep breathing, meditation, or simply pausing to check in with your body can help reduce stress-related biting.
- Use a mouthguard: A custom dental mouthguard creates a physical barrier between your teeth and cheek tissue, which can be especially helpful at night if you bite your cheeks during sleep.
- Chew sugar-free gum: Keeping your mouth occupied with gum can redirect the urge to bite your cheek.
- Address dental alignment: If your bite is uneven or your teeth are crowded, correcting the alignment can eliminate the structural cause. Talk to your dentist about orthodontic options.
- Seek professional help: For severe cases rooted in anxiety or compulsive behavior, cognitive behavioral therapy (CBT) has been shown to be effective in managing body-focused repetitive behaviors.
When to See a Dentist
You should schedule a dental appointment if your cheek biting is causing persistent sores that do not heal within two weeks, if you notice any lumps or unusual tissue changes, or if the habit is causing significant pain that affects your ability to eat comfortably. A dentist can examine the affected area, rule out other conditions, and recommend appropriate treatment. In some cases, a custom mouthguard or adjustments to existing dental work can make a meaningful difference.
If stress or anxiety is driving the habit, your dentist may also recommend coordinating care with a therapist who specializes in behavioral strategies. At Kirkland Premier Dentistry, we take a comprehensive approach to oral health and can help you develop a plan to protect your cheeks and the rest of your mouth from damage.
Caring for Damaged Cheek Tissue
While you work on breaking the habit, there are steps you can take to help your mouth heal. Rinse with warm salt water two to three times a day to reduce inflammation and promote healing. Avoid spicy, acidic, and very hot foods that can irritate the sore tissue. Over-the-counter oral gels containing benzocaine can provide temporary numbing relief for painful areas. Keep up with your regular oral hygiene routine, brushing gently twice a day and flossing daily, to keep the area clean and prevent infection.
Most cheek biting injuries heal on their own within one to two weeks with proper care. If a sore persists beyond that timeframe or worsens, it is important to have it evaluated by a dental professional.