Mouth Sores: Causes, Treatments, and When to Seek Help

Biting the inside of the mouth and causing an ulcer?

I have a sore in my mouth from biting it, and it's been about 4 to 5 days.
I went to the pharmacy and bought an oral ointment to apply, but there hasn't been any improvement.
Instead, applying it causes a stinging sensation; is this normal? Although it usually hurts when I accidentally touch it.

Wo, 10~19 year old female. Ask Date: 2016/04/17

Dr. Zeng Guanghui reply Dentistry

If the oral ointment has not improved after a week, it is advisable to check for any sharp edges on the teeth that may be irritating the gums, causing recurrent mouth sores.
It is recommended to consult a dentist for an examination.

Reply Date: 2016/04/17

More Info

Mouth sores, also known as oral ulcers, can be quite painful and frustrating, especially when they persist for several days without improvement. Understanding the causes, treatments, and when to seek medical help is essential for managing these painful lesions effectively.

Causes of Mouth Sores
Mouth sores can arise from various factors, including:
1. Trauma: Biting the inside of your cheek or tongue, or irritation from braces or dentures can lead to sores.

2. Infections: Viral infections, such as herpes simplex virus, can cause painful sores. Fungal infections like oral thrush can also lead to lesions.

3. Allergic Reactions: Certain foods, dental products, or medications can trigger allergic reactions resulting in mouth sores.

4. Nutritional Deficiencies: Lack of essential vitamins and minerals, particularly B vitamins, vitamin C, and iron, can contribute to the development of sores.

5. Stress: Emotional stress can weaken the immune system, making one more susceptible to mouth sores.

6. Underlying Health Conditions: Conditions like autoimmune diseases (e.g., lupus, Behçet's disease) or gastrointestinal disorders (e.g., Crohn's disease) can manifest as recurrent mouth sores.

Treatments for Mouth Sores
For minor mouth sores, the following treatments may help alleviate pain and promote healing:
1. Topical Treatments: Over-the-counter oral gels or ointments containing benzocaine can numb the area and provide temporary relief. However, if you experience a stinging sensation upon application, it may indicate irritation rather than relief.

2. Saltwater Rinses: Rinsing your mouth with warm salt water can help reduce inflammation and promote healing.

3. Avoiding Irritants: Stay away from spicy, acidic, or abrasive foods that can exacerbate pain.

4. Pain Relievers: Non-prescription pain relievers like acetaminophen or ibuprofen can help manage discomfort.

5. Hydration: Staying hydrated is crucial, especially if eating is painful. Soft, bland foods can be easier to consume.

When to Seek Help
If your mouth sore persists for more than two weeks, worsens, or is accompanied by other symptoms such as fever, difficulty swallowing, or swollen lymph nodes, it is essential to seek medical attention. A healthcare provider may perform a thorough examination and consider additional tests to determine the underlying cause of the sores.

In your case, since you mentioned that the sore has not improved after using an oral paste for several days and that it causes a stinging sensation, it may be beneficial to consult with a healthcare professional. They can assess whether the product you are using is appropriate for your condition or if a prescription treatment is necessary.

Conclusion
Mouth sores can be a common yet distressing issue. Understanding their potential causes and knowing how to treat them can help manage the pain effectively. However, if symptoms persist or worsen, seeking professional medical advice is crucial to rule out any underlying conditions and receive appropriate treatment. Remember, maintaining good oral hygiene and a balanced diet can also play a significant role in preventing future occurrences of mouth sores.

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