A mouth sore is a small, annoying and painful lesion, which can appear on the gums as well as in the mouth. Affecting the quality of life of those who suffer from them, although they are a common condition, many people are unaware of the causes behind these lesions, as well as the symptoms and treatments available.
What are mouth sores?
Mouth sores, also known as aphthous ulcers, are small ulcers that develop on the oral mucosa. They can occur on the tongue, gums, soft palate, inside the cheeks and lips. These lesions are often painful and can make daily activities such as eating, talking and even brushing teeth difficult.
Initially, the sores are usually small but if not properly treated, they can increase in size up to 7 millimeters. In some cases, they may develop additional symptoms such as fever or headaches. It is important to pay attention to these symptoms and seek appropriate treatment to avoid complications and alleviate the discomfort associated with mouth sores.
Types of mouth sores
There are several types of mouth sores, classified according to their size, shape and healing time:
- Minor aphthous ulcers: These are the most common and are usually small, round with a white or yellow center and red edges. They usually disappear in one or two weeks without leaving scars.
- Major aphthous ulcers: These are less common but larger and deeper than minor aphthous ulcers. They can cause severe pain and take several weeks or even months to heal completely.
- Herpetiform aphthous ulcers: This variant is less common and usually appears in elderly people. It is characterized by the presence of multiple aphthae, which can range from 10 to 100, and tend to group together to form a larger, irregular ulcer.
- Herpes labialis: Also known as oral herpes, it presents as painful blisters on or around the lips and mouth. It is caused by herpes simplex virus type 1 (HSV-1).


Symptoms of a sore in the mouth
Symptoms of mouth sores can vary depending on the type and severity of the lesion, but generally include pain and tenderness in the affected area, irritation when talking, eating or brushing teeth. Redness and swelling around the sore and the
formation of a lump or blister before the ulcer appears.
Why do mouth sores appear?
Although a mouth mouth sore can appear spontaneously, they can also be triggered by a variety of factors. Although a mouth sore can appear spontaneously, it can also be triggered by a variety of factors, such as trauma from biting the tongue, cheeks or lips, or injury during tooth brushing, can cause a mouth sore to form.
Viral infections such as herpes simplex virus (HSV-1) is a common cause of mouth sores, especially cold sores. Lack of certain nutrients, such as iron, vitamin B12 and folic acid, can increase the risk of developing mouth sores.
A mouth sore can be caused by emotional stress and hormonal changes that can weaken the immune system and increase susceptibility to developing this type of lesion.
How to cure mouth sores?
Although there are products that can alleviate the symptoms of mouth sores, there is no specific treatment that will eliminate them permanently, as they may reappear due to the causes mentioned above and disappear on their own over time.
The approach to treatment of a mouth sore varies depending on the cause and severity of the lesion. Some treatment options include mouth rinses to reduce inflammation and promote healing.
Topical analgesics and corticosteroids, such as gels or creams containing ingredients like benzocaine or lidocaine, can relieve pain and discomfort, as well as reduce inflammation and speed the healing process. In cases of nutritional deficiencies, iron, vitamin B12 or folic acid supplements may be recommended to improve oral health.
Prevention of mouth sores
While some causes of mouth sores can be difficult to prevent, there are measures that can help reduce the risk of mouth sores, such as maintaining good oral hygiene through regular brushing and flossing.
Avoid foods or beverages that may irritate the mouth, eat a balanced diet rich in vitamins and minerals essential for oral health. And reduce stress through relaxation techniques such as yoga, meditation or deep breathing.
With proper care and good oral hygiene, you can minimize the impact of mouth sores and maintain optimal oral health. Remember that prevention and early care are key to keeping your smile radiant and free of discomfort.
At Carlos Saiz Smile we have a wide professional experience in oral health, which allows us to offer you appropriate treatments to cure mouth sores. We know that your smile is a priority, and we want to help you recover your oral wellness.
