Canker sores can be caused by factors such as stress, mouth injuries, food allergies, and hormonal imbalances.
Canker sores often appear when one is particularly stressed or very tired. A temporary decrease in immune defenses can quickly create a favorable environment for these pesky little ulcers. Other times, it is due to nutritional deficiencies, particularly in iron, vitamin B12, or folic acid, that they decide to show up unannounced. Some acidic or spicy foods, such as citrus fruits or tomatoes, can also irritate the mouth and promote their appearance. Finally, many canker sores simply occur following a minor injury in the mouth, such as when one accidentally bites themselves or after brushing their teeth a bit too vigorously.
Stress and fatigue are clearly among the biggest triggers for canker sores, weakening our immune system and compromising the oral mucosa. Diet also plays an important role: consuming a lot of acidic or very spicy foods can easily trigger these painful little lesions. Certain foods such as citrus fruits, pineapple, tomatoes, cheese, nuts, and chocolate are often singled out. Likewise, nutritional deficiencies also count: a lack of vitamins like vitamin B12, minerals (especially iron or zinc), or folic acid significantly increases the risk of recurring canker sores. Lastly, smoking or drinking a lot of alcohol seriously irritates the mouth, making canker sores more likely, although this varies from person to person.
Some people get canker sores more often than others, for no obvious reason. Why? Because genetics and the immune system come into play. Some individuals have genetic predispositions that make them more sensitive to these unpleasant little lesions. If your parents or siblings frequently have canker sores, there’s a good chance you might also be prone to these oral troubles. Your immune system also plays a role: a temporary decrease in immunity (stress, fatigue, illness) or an excessive immune response can promote the repeated occurrence of canker sores. In short, not everyone is equally affected by canker sores, due to a matter of DNA and internal defense systems!
Accidentally biting the inside of your cheek, injuring yourself with an overly vigorous toothbrush stroke, or irritating your mouth with poorly fitting dental prosthetics can cause minor damage in the mouth. These mini-traumas pave the way for the appearance of canker sores: the damaged mucosa becomes sensitive, and the micro-injuries facilitate the onset of an inflammatory reaction. Chewing too quickly, making a sudden movement, or biting into a hard food (like the crust of a sturdy bread) can sometimes be enough to cause these uncomfortable and painful sores. Even some orthodontic devices, especially when they are new or poorly fitted, increase the risk of repeated canker sores. It's quite simple: if the mouth suffers these small aggressions too often, it reacts by forming irritations that take time to heal.
Canker sores can hide more significant health issues. For example, they often occur when suffering from an autoimmune disease, such as Crohn's disease or ulcerative colitis. The same applies in cases of immune disorders, such as HIV, which weakens the mouth and makes the occurrence of canker sores more frequent. Certain important nutritional deficiencies, such as a severe lack of iron, vitamin B12, or folic acid, are also responsible for recurrent canker sores. Finally, if your canker sores keep coming back for no apparent reason, it's better to keep an eye on that: it might be a sign of an underlying condition to explore with your doctor.
Women are often more prone to canker sores than men, primarily due to hormonal fluctuations related to their menstrual cycle.
A weakened immune system, particularly due to stress or fatigue, can increase the frequency of canker sores in the mouth.
Some acidic or very spicy foods, such as pineapples, tomatoes, or chocolate, can trigger or worsen canker sores in some people.
Despite their painful nature, most canker sores heal spontaneously within 1 to 2 weeks without leaving scars.
Yes, stress is a recognized factor that can promote the occurrence of canker sores. It temporarily weakens the immune defenses, making the appearance of these irritating lesions more likely.
It is advisable to consult a doctor or dentist if the canker sores persist for more than two weeks, reappear very frequently, or if their presence makes eating difficult. This allows for checking whether they are related to an underlying condition.
Saltwater mouth rinses, applying an ice cube locally, or gently dabbing with diluted baking soda are simple and effective solutions to temporarily relieve pain.
We can limit the risk of canker sores by avoiding irritating foods such as citrus fruits or very spicy foods, reducing stress, maintaining good oral hygiene, and using toothpaste without sodium lauryl sulfate.
No, canker sores are not contagious at all; they often result from micro-traumas, dietary factors, immune issues, or genetic predispositions, but they cannot be transmitted from one person to another.
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