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What Are The Common Causes Of Canker Sores?

Canker sores are oral lesions that cause spots and swellings in the mouth, lips or tongue. If you have a canker sore, you’re not alone. It’s stated that 75% of people are affected by it at some point.

Unfortunately, this condition interferes with eating and speaking. Canker sores can last for a few days. However, if they persist for more than a week, contact your dentist right away. Your dentist may recommend a biopsy to determine the real cause. In this way, serious disease can be ruled out.

But what causes canker sores?

There’s no exact cause of canker sores as experts are still discovering why they arise. In this post, let’s take a look at the general causes of canker sores among all patients.

Nutritional deficiency

In some studies, they showed that canker sores are triggered if there’s a lack of folic acid, iron, and zinc in the body. Calcium deficiency may also lead to this painful condition. However, overconsumption of this mineral can cause the condition to get worse. To treat nutritional deficiency and get rid of canker sores, it’s ideal to eat a healthy balanced diet.


Any damage to the mouth can highly likely result in the occurrence of canker sores. Sores are tiny ulcers. When you brush your teeth too hard or eat something that causes bruising, it can lead to inflamed tissues in the mouth. If you wear braces, you’re likely to suffer from it. Furthermore, the use of harsh mouthwash and oral products can lead to canker sores because they damage the outermost part of the mouth.

Any products or actions in the mouth that can lead to tissue injury could cause canker sores.

Some Fruits and Vegetables

Fruits and vegetables are healthy options. However, not all of them are ideal if you’re suffering from mouth sores. Citrus fruits, for example, are highly acidic. They can cause tissue damage and worsen your condition. However, these fruits don’t entirely lead to canker sores. But they can worsen or trigger them if there’s stress on the mouth tissues. If your mouth can’t tolerate the acidic nature of some fruits, then you’re more likely to suffer from mouth sores. Tomatoes and apples are known triggers and must be avoided while you’re recovering from this condition.

Weak Immune Function

If you have a weak immune system, then you’re likely to suffer from canker sores. Unfortunately, it’s difficult to find a link between these two factors. It’s also difficult to determine how a weak immune system can trigger sores. However, those with a poor immune system are reported to suffer from it frequently.

How to Treat Canker Sores?

You can buy a non-prescription topical ointment to treat canker sores. If they’re too painful, you can take pain relievers. To reduce irritation, an antimicrobial mouthwash may help. If you have a secondary infection, antibiotics are prescribed. No matter how painful the sores are, it’s ideal that you continue to maintain a good oral hygiene. That is, you must brush and floss your teeth. If the canker sores have been around for more than a week, you must consult your dentist. They could be a sign of a more serious condition.