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What is a Mouth Ulcer? What Causes It?

By 26 April 2024Dental Health18 min read

A mouth ulcer is a small, usually round sore that forms on the mucous membrane inside the mouth. It appears white or yellow with red, inflamed edges. Although it can form anywhere inside the mouth, it is most commonly seen on the inner cheeks, under the tongue, and inside the lips.

How to Recognize a Mouth Ulcer

Mouth ulcers present with distinct symptoms. The pain from a mouth ulcer can increase during oral activities such as eating, drinking, or speaking. You may see small, red, or white lesions about half a centimeter in diameter in the mouth. These lesions are usually round or oval in shape.

The area affected by the mouth ulcer can be sensitive. Simple contact, such as touching or applying pressure, can cause pain. You may also experience a burning or stinging sensation in the area. Mouth ulcers may cause discomfort while eating or drinking. Spicy, acidic, or hot foods can worsen the pain.

If you experience one or more of these symptoms and notice a distinct lesion in your mouth, you may suspect you have a mouth ulcer. However, you should consult a doctor for a definitive diagnosis.

Types of Mouth Ulcers

Mouth ulcers can occur in various types, with different symptoms and characteristics. Here are the types of mouth ulcers:

  • Minor Ulcers: Minor ulcers are the most common and typically the least severe. These appear as small, round, or oval lesions that are painful. They usually measure a few millimeters to one centimeter in diameter and may heal within a few days.
  • Major Ulcers: Major ulcers are more extensive, deeper, and painful. They are over one centimeter in diameter and take longer to heal. If left untreated, major ulcers may leave scars and could become chronic.
  • Herpetiform Ulcers: Herpetiform ulcers are rare and consist of multiple small ulcers. These appear as lesions smaller than one millimeter in diameter and often cluster together. Despite their name, they are not related to the herpes virus.

Mouth ulcers can also be classified in other ways besides these three main types. However, these three are the most common and clinically significant types.

Symptoms of Mouth Ulcers

Mouth ulcers are painful, presenting with various lesions and causing discomfort while speaking. In some cases, mouth ulcers can cause bad breath.

These symptoms can vary from person to person. Additionally, some people may experience other symptoms such as fever, swollen lymph nodes, or general malaise similar to flu symptoms.

How to Diagnose a Mouth Ulcer

Your doctor can diagnose a mouth ulcer by carefully examining your mouth and oral tissues. Your doctor may ask questions about when the ulcer started, how long the symptoms have persisted, and whether there are any other signs. This information can help determine the underlying cause.

In rare cases, the doctor may perform a biopsy. During this procedure, a sample of the mouth ulcer is taken and sent to the laboratory for examination to determine the underlying cause. Sometimes, the doctor may request blood tests to help determine if the mouth ulcer is related to an infection or other systemic condition.

Diseases that Can Trigger Mouth Ulcers

Some underlying health issues or conditions can trigger the occurrence of mouth ulcers or increase their risk. Here are some diseases and conditions that can trigger mouth ulcers:

  • Immune System Disorders: When the immune system is weakened, the body becomes vulnerable to microbes and infections. Immune system disorders can lead to frequent or prolonged mouth ulcers.
  • Viral Infections: Certain viral infections, especially herpes simplex (HSV), can cause mouth ulcers. The herpes virus is one of the most common causes of recurrent mouth ulcers.
  • Bacterial Infections: Some bacteria, such as streptococci, can cause mouth infections and potentially lead to the development of mouth ulcers.

The underlying causes and triggers of mouth ulcers can vary from person to person. Therefore, if you have recurrent or persistent mouth ulcers, consult a doctor.

Are Mouth Ulcers Contagious?

Mouth ulcers are not directly contagious through contact. For example, shaking hands, kissing, or sharing utensils with a person with mouth ulcers will not transmit the condition. However, mouth ulcers can sometimes be caused by viruses or bacteria, which can be contagious.

For example, mouth ulcers caused by the herpes simplex virus (HSV) can be contagious. HSV, especially type 1 (HSV-1), is one of the most common causes of mouth ulcers and can spread quickly through contact. HSV-1 can be transmitted through close contact, such as kissing or sharing utensils with someone infected.

How Long Do Mouth Ulcers Last?

The duration of mouth ulcers typically varies from a few days to two weeks. However, the healing time can depend on various factors, and each individual may experience different durations.

Minor ulcers heal more quickly, while larger or deeper ones heal longer. Treatment of the ulcer can affect the healing process. People with healthy immune systems may recover from mouth ulcers more quickly, while those with weakened immune systems may take longer to heal.

When to See a Doctor?

Mouth ulcers usually heal on their own, but there are times when seeing a doctor is essential. If your mouth ulcer is painful and over-the-counter medications or home remedies do not relieve you, you should consult a doctor.

You should see a doctor if your mouth ulcer occurs alongside other symptoms such as fever, swollen lymph nodes, or general malaise. These symptoms could indicate an underlying infection or other health condition.

If you have a chronic illness and suspect that your mouth ulcer may be related to it, you should contact your doctor. For example, certain diseases like Crohn’s disease or Behçet’s syndrome can cause mouth ulcers.

How Are Mouth Ulcers Treated?

Mouth ulcers usually heal independently, and relief can often be found with home remedies. However, there are several treatment options to reduce pain, speed up the healing process, and lower the risk of infection. Here are some treatments for mouth ulcers:

  • Pain Relievers: Topical pain relievers or oral painkillers can alleviate pain in the area affected by mouth ulcers.
  • Mouthwashes: Antiseptic or anti-inflammatory mouthwashes can help speed up the healing process and reduce the risk of infection. Saline mouthwash or mouthwash containing benzidamine can be used for this purpose.
  • Diet Changes: Avoiding excessively hot, spicy, or acidic foods can help reduce pain associated with mouth ulcers. Eating a nutritious diet and staying hydrated can support the healing process.
  • Oral Hygiene: Keeping mouth ulcers clean can reduce the risk of infection and speed up healing. Brushing your teeth at least twice daily, using dental floss, and rinsing with an antiseptic mouthwash are essential.

You can support the healing process by using appropriate methods.

Is Home Treatment Possible?

Yes, home treatment for mouth ulcers is possible. Many people use home remedies to alleviate and speed up the healing process. Here are some effective home treatment methods for mouth ulcers:

  • Saline Mouthwash: Gargling with warm saline water (a teaspoon of salt in a glass of warm water) several times a day can help heal mouth ulcers.
  • Aloe Vera Gel: Pure aloe vera gel, which has anti-inflammatory and healing properties, can be applied directly to mouth ulcers. This can help reduce pain and inflammation and speed up healing.
  • Honey: Honey has natural antibacterial and healing properties. It can be applied to mouth ulcers to aid the healing process. A thin layer of honey applied to the ulcer can be beneficial.
  • Herbal Teas: Some herbal teas with anti-inflammatory and antiseptic properties can help heal mouth ulcers. Chamomile, sage, and green tea can be brewed and applied topically to the ulcer.
  • Ice: Applying ice to mouth ulcers can help relieve pain and reduce inflammation. Wrap an ice cube in a thin cloth and gently press it against the ulcer.

These home remedies can alleviate symptoms of mouth ulcers and speed up the healing process.

Dental Treatment Methods for Mouth Ulcers

While mouth ulcers usually heal independently, dental treatments can sometimes help relieve pain, speed up healing, and prevent recurrence. Here are some dental treatments for mouth ulcers:

  • Topical Creams or Gels: Topical creams or gels applied to mouth ulcers can help relieve pain and speed up the healing process. These products are usually available in pharmacies.
  • Steroid Medications: Prescription steroid medications for mouth ulcers can help relieve pain, reduce inflammation, and speed healing. These medications are usually applied directly to the ulcer.
  • Laser Therapy: Laser therapy is another method for treating mouth ulcers. It can reduce pain, speed up healing, and lower the risk of infection. Laser therapy may also prevent the recurrence of mouth ulcers.
  • Chemical Cauterization: Chemical cauterization is another method for treating mouth ulcers. This method involves applying a chemical substance to the mouth ulcer to speed up healing and prevent recurrence.

These treatment methods can be used based on your doctor’s recommendations.

How Can You Prevent Mouth Ulcers?

Good oral hygiene can reduce the risk of developing mouth ulcers. Brushing your teeth and using dental floss can help reduce bacteria and plaque buildup in the mouth.

Stress can weaken the immune system, increasing the risk of mouth ulcers.

A balanced and healthy diet can strengthen the body’s immune system. Consuming foods rich in nutrients such as vitamin C, iron, and B is essential. Spicy and acidic foods can increase the risk of developing mouth ulcers or exacerbate symptoms.

Sleeping regularly can strengthen the body’s immune system and help prevent mouth ulcers.

What is a Mouth Ulcer? What Causes It?

A mouth ulcer is a small, usually round sore that forms on the mucous membrane inside the mouth. It appears white or yellow with red, inflamed edges. Although it can form anywhere inside the mouth, it is most commonly seen on the inner cheeks, under the tongue, and inside the lips.

How to Recognize a Mouth Ulcer

Mouth ulcers present with distinct symptoms. The pain from a mouth ulcer can increase during oral activities such as eating, drinking, or speaking. You may see small, red, or white lesions about half a centimeter in diameter in the mouth. These lesions are usually round or oval in shape.

The area affected by the mouth ulcer can be sensitive. Simple contact, such as touching or applying pressure, can cause pain. You may also experience a burning or stinging sensation in the area. Mouth ulcers may cause discomfort while eating or drinking. Spicy, acidic, or hot foods can worsen the pain.

If you experience one or more of these symptoms and notice a distinct lesion in your mouth, you may suspect you have a mouth ulcer. However, you should consult a doctor for a definitive diagnosis.

Types of Mouth Ulcers

Mouth ulcers can occur in various types, with different symptoms and characteristics. Here are the types of mouth ulcers:

  • Minor Ulcers: Minor ulcers are the most common and typically the least severe. These appear as small, round, or oval lesions that are painful. They usually measure a few millimeters to one centimeter in diameter and may heal within a few days.
  • Major Ulcers: Major ulcers are more extensive, deeper, and painful. They are over one centimeter in diameter and take longer to heal. If left untreated, major ulcers may leave scars and could become chronic.
  • Herpetiform Ulcers: Herpetiform ulcers are rare and consist of multiple small ulcers. These appear as lesions smaller than one millimeter in diameter and often cluster together. Despite their name, they are not related to the herpes virus.

Mouth ulcers can also be classified in other ways besides these three main types. However, these three are the most common and clinically significant types.

Symptoms of Mouth Ulcers

Mouth ulcers are painful, presenting with various lesions and causing discomfort while speaking. In some cases, mouth ulcers can cause bad breath.

These symptoms can vary from person to person. Additionally, some people may experience other symptoms such as fever, swollen lymph nodes, or general malaise similar to flu symptoms.

How to Diagnose a Mouth Ulcer

Your doctor can diagnose a mouth ulcer by carefully examining your mouth and oral tissues. Your doctor may ask questions about when the ulcer started, how long the symptoms have persisted, and whether there are any other signs. This information can help determine the underlying cause.

In rare cases, the doctor may perform a biopsy. During this procedure, a sample of the mouth ulcer is taken and sent to the laboratory for examination to determine the underlying cause. Sometimes, the doctor may request blood tests to help determine if the mouth ulcer is related to an infection or other systemic condition.

Diseases that Can Trigger Mouth Ulcers

Some underlying health issues or conditions can trigger the occurrence of mouth ulcers or increase their risk. Here are some diseases and conditions that can trigger mouth ulcers:

  • Immune System Disorders: When the immune system is weakened, the body becomes vulnerable to microbes and infections. Immune system disorders can lead to frequent or prolonged mouth ulcers.
  • Viral Infections: Certain viral infections, especially herpes simplex (HSV), can cause mouth ulcers. The herpes virus is one of the most common causes of recurrent mouth ulcers.
  • Bacterial Infections: Some bacteria, such as streptococci, can cause mouth infections and potentially lead to the development of mouth ulcers.

The underlying causes and triggers of mouth ulcers can vary from person to person. Therefore, if you have recurrent or persistent mouth ulcers, consult a doctor.

Are Mouth Ulcers Contagious?

Mouth ulcers are not directly contagious through contact. For example, shaking hands, kissing, or sharing utensils with a person with mouth ulcers will not transmit the condition. However, mouth ulcers can sometimes be caused by viruses or bacteria, which can be contagious.

For example, mouth ulcers caused by the herpes simplex virus (HSV) can be contagious. HSV, especially type 1 (HSV-1), is one of the most common causes of mouth ulcers and can spread quickly through contact. HSV-1 can be transmitted through close contact, such as kissing or sharing utensils with someone infected.

How Long Do Mouth Ulcers Last?

The duration of mouth ulcers typically varies from a few days to two weeks. However, the healing time can depend on various factors, and each individual may experience different durations.

Minor ulcers heal more quickly, while larger or deeper ones heal longer. Treatment of the ulcer can affect the healing process. People with healthy immune systems may recover from mouth ulcers more quickly, while those with weakened immune systems may take longer to heal.

When to See a Doctor?

Mouth ulcers usually heal on their own, but there are times when seeing a doctor is essential. If your mouth ulcer is painful and over-the-counter medications or home remedies do not relieve you, you should consult a doctor.

You should see a doctor if your mouth ulcer occurs alongside other symptoms such as fever, swollen lymph nodes, or general malaise. These symptoms could indicate an underlying infection or other health condition.

If you have a chronic illness and suspect that your mouth ulcer may be related to it, you should contact your doctor. For example, certain diseases like Crohn’s disease or Behçet’s syndrome can cause mouth ulcers.

How Are Mouth Ulcers Treated?

Mouth ulcers usually heal independently, and relief can often be found with home remedies. However, there are several treatment options to reduce pain, speed up the healing process, and lower the risk of infection. Here are some treatments for mouth ulcers:

  • Pain Relievers: Topical pain relievers or oral painkillers can alleviate pain in the area affected by mouth ulcers.
  • Mouthwashes: Antiseptic or anti-inflammatory mouthwashes can help speed up the healing process and reduce the risk of infection. Saline mouthwash or mouthwash containing benzidamine can be used for this purpose.
  • Diet Changes: Avoiding excessively hot, spicy, or acidic foods can help reduce pain associated with mouth ulcers. Eating a nutritious diet and staying hydrated can support the healing process.
  • Oral Hygiene: Keeping mouth ulcers clean can reduce the risk of infection and speed up healing. Brushing your teeth at least twice daily, using dental floss, and rinsing with an antiseptic mouthwash are essential.

You can support the healing process by using appropriate methods.

Is Home Treatment Possible?

Yes, home treatment for mouth ulcers is possible. Many people use home remedies to alleviate and speed up the healing process. Here are some effective home treatment methods for mouth ulcers:

  • Saline Mouthwash: Gargling with warm saline water (a teaspoon of salt in a glass of warm water) several times a day can help heal mouth ulcers.
  • Aloe Vera Gel: Pure aloe vera gel, which has anti-inflammatory and healing properties, can be applied directly to mouth ulcers. This can help reduce pain and inflammation and speed up healing.
  • Honey: Honey has natural antibacterial and healing properties. It can be applied to mouth ulcers to aid the healing process. A thin layer of honey applied to the ulcer can be beneficial.
  • Herbal Teas: Some herbal teas with anti-inflammatory and antiseptic properties can help heal mouth ulcers. Chamomile, sage, and green tea can be brewed and applied topically to the ulcer.
  • Ice: Applying ice to mouth ulcers can help relieve pain and reduce inflammation. Wrap an ice cube in a thin cloth and gently press it against the ulcer.

These home remedies can alleviate symptoms of mouth ulcers and speed up the healing process.

Dental Treatment Methods for Mouth Ulcers

While mouth ulcers usually heal independently, dental treatments can sometimes help relieve pain, speed up healing, and prevent recurrence. Here are some dental treatments for mouth ulcers:

  • Topical Creams or Gels: Topical creams or gels applied to mouth ulcers can help relieve pain and speed up the healing process. These products are usually available in pharmacies.
  • Steroid Medications: Prescription steroid medications for mouth ulcers can help relieve pain, reduce inflammation, and speed healing. These medications are usually applied directly to the ulcer.
  • Laser Therapy: Laser therapy is another method for treating mouth ulcers. It can reduce pain, speed up healing, and lower the risk of infection. Laser therapy may also prevent the recurrence of mouth ulcers.
  • Chemical Cauterization: Chemical cauterization is another method for treating mouth ulcers. This method involves applying a chemical substance to the mouth ulcer to speed up healing and prevent recurrence.

These treatment methods can be used based on your doctor’s recommendations.

How Can You Prevent Mouth Ulcers?

Good oral hygiene can reduce the risk of developing mouth ulcers. Brushing your teeth and using dental floss can help reduce bacteria and plaque buildup in the mouth.

Stress can weaken the immune system, increasing the risk of mouth ulcers.

A balanced and healthy diet can strengthen the body’s immune system. Consuming foods rich in nutrients such as vitamin C, iron, and B is essential. Spicy and acidic foods can increase the risk of developing mouth ulcers or exacerbate symptoms.

Sleeping regularly can strengthen the body’s immune system and help prevent mouth ulcers.

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