Oral Hygiene

Oral Hygiene

What is and what causes Childhood Stomatitis?

Discover everything you need to know about childhood stomatitis and how to treat mouth sores in children.

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MALO CLINIC

From science to smile

What is and what causes Childhood Stomatitis?

What is childhood stomatitis?

The word stomatitis refers to inflammations that occur in the mouth. It is a complication that can affect people of all ages; however, it is more commonly seen during childhood.

Childhood stomatitis occurs in children, being more prevalent in the early years of life, between the ages of two and five. This inflammation manifests in the mouth and can affect the gums, tongue, roof of the mouth, lips, or even the throat, creating aphthae or sores. In some cases, it can even cause a high fever. Stomatitis is divided into several categories, with aphthous stomatitis referring to sores in the child's mouth. This type of stomatitis can be classified into three groups:

  1. Minor aphthous stomatitis: this is the most common and is characterized by the appearance of small sores in the mouth, which tend to disappear completely in less than fifteen days.

  2. Major aphthous stomatitis: these sores can reach one centimetre in size and may take months to disappear completely from the child's mouth. They are less frequent.

  3. Herpetiform stomatitis: refers to very small sores that appear in an outbreak, in large numbers, possibly reaching a hundred sores in the mouth at once. It is also a less common type of stomatitis.

Is childhood stomatitis contagious?

There are several types of stomatitis, so in some cases, contagion can occur, such as in viral stomatitis, which is easily transmissible through direct contact with the inflamed area, by coming into contact with saliva droplets that are passed through, for example, a kiss. The incubation period for the inflammation generally takes between two to twelve days to manifest.

In the case of childhood aphthous stomatitis, there is no contagion. This inflammation is not transmissible.

Child with symptoms of childhood stomatitis

What are the symptoms of childhood stomatitis?

We list some symptoms of childhood stomatitis to watch for:

  • Aphthae;

  • Yellow or grey lesions in the mouth, with red borders;

  • Pain in localized areas of the mouth;

  • Pain when swallowing;

  • Swelling of the tonsils;

  • Reduced appetite;

  • Wounds on the lips;

  • Bad breath;

  • Wounds in localized areas of the mouth;

  • Sensation of general malaise and fever.

These symptoms may appear in full or only in part. To ensure it is indeed childhood stomatitis, we recommend taking the child to a doctor for an appropriate diagnosis.

What causes childhood stomatitis?

There are several causes of childhood stomatitis. However, the main cause is infection by the herpes virus, type 1 (HSV-1), which is transmitted through skin contact between the child and an infected person.

Another common cause of childhood stomatitis is the Coxsackie virus. This virus is transmitted through skin-to-skin contact with other people, through objects, or even food that is contaminated with germs from the infected person.

Both of these viruses are passed on when the immune system is low, beginning to affect the child.

Aphthous stomatitis in children can also have other causes, such as:

  • Family history of inflammation;

  • Injuries in the mouth;

  • Poor oral hygiene;

  • Changes in diet;

  • Celiac disease.

How to treat childhood aphthous stomatitis?

To treat childhood aphthous stomatitis, it is best to consult a doctor for proper treatment guidance for the child. It is highly likely that some medications will be recommended depending on the state of inflammation, which may include paracetamol or other medications for childhood stomatitis - with anti-inflammatory effects - to assist in the child's recovery.

The goal is to alleviate symptoms such as pain and discomfort, as well as to aid in the healing of the ulcers.

How to manage childhood stomatitis?

To manage childhood stomatitis, there are some precautions that must be taken into account to ensure a full and fast recovery for the child. We highlight three important precautions below:

  • Use a soft toothbrush to clean the child's teeth without causing injury;

  • Use gauze to disinfect the lesions in the child's mouth whenever necessary;

  • Hygienize the child's toys to prevent virus transmission through saliva droplets that can easily transfer to objects, whether through the mouth or unwashed hands.

By following these recommendations and consulting a specialist, you can rest assured that your child's treatment will proceed smoothly and yield positive results. You can always schedule an appointment with the MALO CLINIC if your child shows symptoms of discomfort, so that we can assist you in the best possible way.

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@ 2026 ALL RIGHTS RESERVED - MALO CLINIC SA NIF 503411434 ERS No. 12920

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We accompany each step of your clinical journey, focusing on your comfort, confidence, and smile.

@ 2026 ALL RIGHTS RESERVED - MALO CLINIC SA NIF 503411434 ERS No. 12920

Developed by