What causes mouth ulcers? Includes medications and how to treat them! 

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Last updated May 1, 2022

What is stomatitis?

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Mouth ulcers are growths that form on the gums, tongue, and other mucous membranes in the mouth,

By touch or irritation from food or drink.Pain and discomfort may occur.

Then, because the mouth is a very sensitive place in the human body,

A little pain or discomfort can affect daily life.

In addition, mouth ulcers can be caused by a variety of factors, including bacteria and viruses, and there is a wide range of treatment options,

It is important to note that if the mouth ulcer is not healing well, it may not be a mouth ulcer.

Causes of mouth ulcers

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orthopedic device

Regardless of the orthodontic appliance used, whether mouthpiece, wire, or floor braces, rubbing of the appliance can cause mouth sores to form.

In particular, mouthpiece orthodontic attachments (plastic protrusions to move teeth), wire orthodontic brackets (devices to hold wires in place), wire tips, and floor orthodontic wires are common causes of mouth sores.

dental prosthesis

When a dentist treats a cavity, he or she restores the tooth shape by placing a cap, denture, or implant where there are no teeth.

Because coverings, dentures, and implants are not originally present in the oral cavity,Especially immediately after being placed in the oral cavity, they may rub against the mucous membranes of the mouth and cause mouth sores.

Side Effects of Medication

Prolonged administration of antibiotics can lead to an imbalance of bacteria in the oral cavity.

Bacterial imbalances can affect the immune system, making mouth ulcers more likely to occur.

In addition, the side effects of various medications can cause a loss of saliva. When saliva is lost, the mouth becomes dry and mouth ulcers are more likely to form.


B vitamins are one of the most common causes of mouth ulcers caused by nutritional deficiencies.

B vitamins play an important role in the protection of oral mucous membranes and wound healing, and are also involved in the immune system.

because ofDeficiency of B vitamins can easily cause mouth sores.


When stress builds up, the body's metabolism and immune system are weakened.

The mucous membranes of the oral cavity are constantly undergoing metabolic changes.

Stress can affect the metabolism of the mucous membranes, making mouth ulcers more likely to form.

lack of sleep

Sleep deprivation decreases the number of immune cells in the body, and when the immune system is weakened, mouth ulcers are more likely to form.

Even when sleep is available, the immune system is also weakened if the time of falling asleep or waking up is not consistent.


Bacterial infections can cause mouth sores in the oral cavity.

Examples include syphilis caused by treponema syphilis and gonorrheal infection caused by Neisseria gonorrhoeae.

Mouth ulcers caused by bacterial infection can also easily result from poor oral cleaning.


Viral infections can cause mouth sores in the oral cavity.

Examples include herpetic stomatitis caused by herpes viruses, and perpangina and hand-foot-and-mouth disease caused by coxsackie and enteroviruses.

Mouth sores caused by viral infections can also result from poor oral cleaning.

Common sites of mouth ulcers


It depends on the cause of the mouth ulcers,

The back of the lips, the buccal mucosa, and the margins of the tongue.are listed below.

Both of these areas are prone to abrasion by food and dental materials.

Mouth ulcers are usually white lesions about a few millimeters in diameter, with reddish color around the white areas.

Bacterial and viral mouth ulcers can also be found on the gums, and they are numerous.

It is important to note that mouth ulcers can look like mouth ulcers and not be mouth ulcersThis is to say.

If it is not a mouth ulcer, it may be a tumor or something else that will grow if left untreated,

Mouth sores that do not heal for more than two weeks should be referred to a dentist.

How to cure mouth ulcers


spontaneous recovery

Mouth ulcers are basically cured by one's own immune system.

It is effective if the immune system is activated by adjusting the rhythm of life and eating right.

However, some mouth ulcers are not easily cured by one's own immune system.

In such cases, a visit to a dentist is recommended.

Ointment or paste for mouth ulcers

Ointments and pastes are drugstoIt can be purchased at a or prescribed by a medical institution.

Mouth ulcer medications contain ingredients that act to reduce inflammation, and some prescription medications contain steroids.

Because of the presence of saliva in the oral cavity, it is difficult for the drug to be stored.

Therefore, most ointments are designed so that saliva does not wash away the medicinal ingredients, and most pastes are designed so that they do not come off.

Taisho Pharmaceutical Stomatitis and Glossitis Therapeutic Drugs Stomatitis Patch Taisho A (10 patches) Tsuruha Drug
m 4987316007786
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¥684 (2024/03/03 05:49:19時点 楽天市場調べ-Details)


It contains sodium azulene sulfonate, which reduces inflammation, and cetylpyridinium chloride and povidone-iodine, which have bactericidal effects.

Although not applicable to children and the elderly who cannot gargle, it is effective because the medicinal ingredients are easily spread throughout the oral cavity.

It can be prescribed by a health care provider or purchased at a drugstore.

created by Rinker.
¥1,129 (2024/03/03 05:49:19時点 楽天市場調べ-Details)

medicine taken internally

The appropriate one is prescribed for each cause of mouth ulcers.

If it is due to vitamin deficiency, vitamin supplements,

Antibacterial and antiviral drugs are prescribed for bacterial and viral infections.

Antibiotics and antivirals are not available without a prescription from a health care provider.

Chocola BB Mouth ulcer Repair Shot 30ml

laser therapy

Dental laser therapy can speed the healing of mouth ulcers.

This is because laser irradiation can promote tissue wound healing.

Commonly used dental lasers are carbon dioxide lasers and erbium yag lasers.

Laser treatment may feel a little tingling, but is almost painless.

Also,Laser treatment also has an immediate effect and often significantly reduces pain in cases of painful mouth ulcers.

If you are concerned about mouth ulcers, see your dentist.

Stomatitis can be caused by changes in systemic conditions or mechanical irritation such as orthodontic appliances or dentures.

Some mouth ulcers are not painful, and in such cases there is no problem waiting for them to heal naturally.

When you have mouth ulcers that cause pain or discomfort, of course, but also when you have mouth ulcers that do not heal for a long time, it may not be mouth ulcers,We recommend that you see a dentist as soon as possible.

365dentist can help you choose a dentist if you are considering orthodontic treatment and

There are also dentist-run open chats and other services to discuss orthodontic concerns.

If you suffer from mouth sores during orthodontic treatment or are concerned about them, please check it out!

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imageWritten by dentist/issy

After graduating from the National School of Dentistry, he trained at the Tokyo Medical and Dental University Dental Hospital, and is currently working in general and orthodontic dentistry.

Member of the Japanese Society of Oral Implantology


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