Ulcers in the mouth

Afte, or aphthous ulcer, wound in the oral mucosa that often occurs in connection with infections. First, small blisters are formed which then develop into small wounds. Afte generally disappears within ten days, without treatment. In more severe cases, you may need medication to relieve the hassle.

More than every other person is affected by temporary mouth ulcers. Woundless wounds do not infect, unlike cold sores caused by the herpes simplex virus.

Symptom at night

Common signs of abrasive wounds are that it hurts and burns when you eat. The trouble debuts like small blisters and develops into defined, crater-shaped wounds. The wounds vary in size depending on where in the mouth they sit and often have a strong redness around. They do not bleed, but can hurt.

How many wounds occur and how painful they vary from person to person. Some get some occasional wounds sometimes, others are bothered by many wounds relatively often.


It is not entirely clear what causes afte. The wounds are often formed in a general condition, for example in connection with infections. Then an auto-immune process is likely to occur, which causes the body’s defense system to react to the body’s own tissues. Studies also show that an already irritated oral mucosa can be impaired by toothpaste and mouthwashes containing so-called sodium lauryl sulfate (SLS).

Some suffer from afte in connection with gluten intolerance (celiac disease). Afte can sometimes be a first sign of inflammatory bowel disease, low blood values ​​or anemia (anemia).


Ulcers in the mouth often heal by themselves within ten days. If the wounds do not go away or if you are so ill that you cannot eat, there are also medicines that can relieve the problems.

What you can do for yourself

To relieve afte, it can sometimes help to avoid mouthwash and toothpaste with sodium lauryl sulfate (SLS). If you have a hard time eating it may help to choose a liquid diet for a period of time. You can also alleviate the hassles by avoiding hot food and spicy foods.

Then you should seek care

If you have had ulcers in your mouth for more than two weeks or have recurring problems, you should seek medical attention. If you have severe nausea and find it difficult to eat, you should also seek care.

So APPOTEK can help

You can contact us at APPOTEK for help at night. A nurse or a physician makes an individual assessment based on your symptoms and what emerges during the care appointment. You can then be prescribed treatment or referred for further treatment.

Keep in mind that if it is your child who has a problem, the child needs to attend the care meeting.


Kristina Bergstrand, a specialist in general medicine