You are currently viewing Mouth Blisters: Symptoms, Treatment, And Prevention Methods

If you’ve ever had small, painful sores inside your mouth, you know how uncomfortable they can be. These mouth blisters, oral ulcers, or canker sores can cause discomfort while eating, drinking, and speaking. Although they typically heal within a week or two, knowing their symptoms, treatment options, and prevention methods to reduce discomfort and promote faster healing is helpful. This article provides a detailed exploration of these aspects.

Symptoms Of Mouth Blisters:

Mouth blisters typically appear as round or oval sores with a red border and a white or yellowish center. The affected area may be sensitive or painful, making it difficult to eat or drink. Additional symptoms can include a burning or tingling sensation before the blister’s formation. Some individuals may experience swollen lymph nodes or a low-grade fever. Mouth blisters can occur on the tongue, inside the cheeks, roof of the mouth, or gums.

Treatment Options:

Most mouth blisters heal without medical intervention, but specific remedies can help alleviate symptoms and promote faster healing. Over-the-counter topical ointments and gels containing benzocaine or lidocaine can provide temporary relief by numbing the area. Rinsing the mouth with salt water or a baking soda solution can help reduce inflammation and aid healing. Applying a topical oral bandage or using a mouth rinse containing dexamethasone can also provide relief.

If you are experiencing severe or recurring mouth blisters, you must consult with a healthcare professional. They can provide you with more vital topical treatments or recommend a mouthwash that contains corticosteroids to reduce inflammation and promote healing. You may be prescribed systemic medications, including immune-suppressing drugs, in more severe cases. It is crucial to address this issue promptly to ensure effective treatment.

Prevention Methods:

  • Practice good oral hygiene: Brush your teeth at least twice daily and floss daily to maintain a clean and healthy mouth. This helps prevent infection and keeps your immune system strong.
  • Avoid triggers: To prevent mouth blisters, it’s essential to identify and avoid any triggers that may cause them. These triggers can include stress, certain foods (such as acidic or spicy ones), excessive exposure to sunlight, and hormonal changes.
  • Protect your lips: Apply a lip balm with SPF to protect your lips from sun damage. Sunburn can trigger cold sores, so shielding your lips from excessive sun exposure is essential.
  • Avoid sharing personal items: Refrain from sharing things like utensils, towels, or lip balm with others, especially if they have active cold sores. Prevent the spread of the herpes simplex virus, which is responsible for cold sores, with this method.
  • Manage stress: Stress weakens the immune system and can trigger mouth blisters in some individuals. Find healthy ways to manage stress, such as exercising regularly, practicing relaxation techniques, getting  sleeping pills, and seeking support from friends or professionals if needed.
  • Stay hydrated: Drink plenty of water daily to keep your mouth moist. A dry mouth can irritate the oral tissues and potentially contribute to the formation of mouth blisters.
  • Maintain a balanced diet: Eat a well-balanced diet rich in vitamins and minerals to support your immune system. Include foods high in vitamin C, zinc, and lysine, as these nutrients promote healing and support immune function.
  • Avoid irritants: Steer clear of foods or beverages that may irritate your mouth, such as acidic fruits, hot drinks, or spicy foods. Go for a softer diet if you’re experiencing a mouth blister outbreak to minimize discomfort.
  • Apply topical treatments: Over-the-counter creams or ointments containing numbing agents, such as benzocaine, can temporarily relieve pain and discomfort associated with mouth blisters. Antiviral creams may also help shorten the duration of cold sores caused by the herpes simplex virus.

While the exact cause of mouth blisters is unknown, several factors are believed to contribute to their development. These include minor injuries from dental work or accidental bites, hormonal changes, stress, nutritional deficiencies, and underlying health conditions. Maintaining good oral hygiene is essential to reduce the risk of mouth blisters. To maintain good oral hygiene, brushing your teeth twice daily with a soft-bristled toothbrush and regularly flossing is critical.

 Avoiding irritating foods and beverages, such as acidic or spicy foods, can also help prevent the occurrence of mouth blisters. Stress management techniques, such as exercise, meditation, or therapy, may reduce the frequency and severity of outbreaks. In some cases, identifying and avoiding specific triggers can be beneficial. These triggers can vary from person to person but may include certain foods, such as citrus fruits or chocolate, or habits like smoking or chewing gum.


Mouth blisters can be a painful and uncomfortable condition, but with a proper understanding of their symptoms, treatment options, and prevention methods, one can effectively manage them. Most mouth blisters heal independently, but over-the-counter remedies and prescribed medications can relieve and expedite healing. 

By adopting good oral hygiene practices, managing stress levels, and identifying and avoiding triggers, individuals can reduce the frequency and severity of mouth blister outbreaks. If mouth blisters are persistent or severe, seeking medical advice for a comprehensive evaluation and appropriate treatment is advisable.

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