Oral Ulcers: Symptoms, Causes, Diagnosis, and Treatment

What Are Oral Ulcers?

Oral ulcers are small, painful sores that form inside the mouth. These mouth sores can appear on the tongue, gums, cheeks, or lips. Sometimes, people call them canker sores or oral lesions. Although most oral ulcers are not dangerous, they can make eating and talking uncomfortable. According to the World Health Organization, oral ulcers are common and affect people of all ages. In many cases, these sores heal on their own within one to two weeks. However, some ulcers may last longer or return often.

Common Symptoms of Oral Ulcers

Oral ulcers have several signs that help you spot them early. For example, you may notice:

Round or oval sores with a white, yellow, or gray center

Red, swollen edges around the sore

Pain or burning, especially when eating spicy or acidic foods

Difficulty talking or swallowing

Sometimes, mild fever or swollen lymph nodes (rare)

Usually, these symptoms last for about one to two weeks. But if the sores do not heal or get worse, you should see a doctor. In some cases, mouth sores can signal a more serious health problem.

Causes of Oral Ulcers

Many things can cause oral ulcers. While some triggers are common, others are less well known. Here are some possible causes:

Minor mouth injuries, such as biting your cheek or brushing too hard

Stress or lack of sleep

Eating spicy, acidic, or rough foods

Food allergies or sensitivities

Hormonal changes, especially in women

Vitamin or mineral deficiencies, like low iron or vitamin B12

Infections, such as viral or bacterial illnesses

Certain medicines, including some painkillers and antibiotics

Medical conditions, such as celiac disease or inflammatory bowel disease

For some people, oral ulcers come back often. In these cases, doctors may look for an underlying cause. The Centers for Disease Control and Prevention notes that most mouth sores are not linked to serious diseases.

How Oral Ulcers Are Diagnosed

Doctors usually diagnose oral ulcers by looking at the sores and asking about your symptoms. First, they may ask how long you have had the sores and if they return often. Next, your doctor might check your mouth for other signs, like swelling or infection. Sometimes, they may order blood tests to check for vitamin deficiencies or other health problems. Rarely, a small sample of the sore (a biopsy) is needed to rule out other conditions. Most of the time, no special tests are needed for simple canker sores or mouth ulcers.

Treatment Options for Oral Ulcers

Most oral ulcers heal on their own. However, treatment can help reduce pain and speed up healing. Some common options include:

Rinsing your mouth with salt water or a mild antiseptic solution

Using over-the-counter gels or creams to numb the pain

Avoiding spicy, acidic, or rough foods while the sore heals

Taking pain relievers, such as acetaminophen, if needed

For severe or frequent ulcers, doctors may prescribe stronger medicines

In rare cases, if oral ulcers do not heal or keep coming back, your doctor may suggest further tests. According to the CDC, most mouth sores are not serious and respond well to simple treatments.

Tips for Managing Oral Ulcers at Home

While oral ulcers can be painful, several home care steps can help you feel better. For instance, you can:

Keep your mouth clean by brushing gently with a soft toothbrush

Rinse with salt water or baking soda solution to soothe the sore

Drink cool water or suck on ice chips to ease pain

Avoid foods that trigger pain, such as citrus or spicy dishes

Try to reduce stress, as it can make mouth sores worse

Additionally, using a straw for drinks may help avoid touching the sore. If you have frequent mouth sores, keeping a food diary may help you find triggers.

Preventing Oral Ulcers

Although not all oral ulcers can be prevented, some steps may lower your risk. For example, you can:

Brush and floss daily to keep your mouth healthy

Use a soft-bristled toothbrush to avoid injury

Eat a balanced diet rich in vitamins and minerals

Limit spicy, acidic, or rough foods if they cause problems

Manage stress with relaxation techniques

Visit your dentist regularly for checkups

In many cases, these simple habits can help prevent mouth sores and keep your mouth healthy. If you live in a specific area, your local dentist or healthcare provider can offer more advice tailored to your needs.