
If your mouth stings and you feel pain whenever you eat, you may have canker sores. Most cases improve naturally over time, but if they occur repeatedly or do not heal for a long time, it is important to identify the cause. Today, we will look at the causes of canker sores and how to help them heal quickly—topics many people are curious about.
What Are Canker Sores?

Canker sores refer to inflammation of the mucous membranes inside the mouth. They can occur on the inside of the lips, the tongue, the gums, and the inner cheek lining, and often appear as white or yellow ulcers. Although they are usually small, they can be painful enough to make eating or speaking uncomfortable, and they may recur.
What Causes Canker Sores?

It is difficult to identify a single cause of canker sores. In many cases, several factors work together.
- Fatigue and Stress
This is one of the most commonly cited causes. When lack of sleep, excessive workload, or stress continues, immunity may decline, increasing the likelihood of developing canker sores.
- Nutritional Imbalance
A deficiency in B vitamins, iron, or folate may weaken the oral mucous membranes. They occur relatively often in people with highly unbalanced diets or irregular eating habits.
- Irritation Inside the Mouth
Canker sores may also develop if you accidentally bite the inside of your mouth or if the mucous membranes are repeatedly irritated by sharp teeth or dental restorations. In particular, chipped or worn teeth can cause repeated damage to the mucous membranes.
- Reduced Immunity
Canker sores often appear after a cold or a decline in overall physical condition. This is because the body’s ability to repair the mucous membranes decreases as fatigue increases.
How Can Canker Sores Heal More Quickly?

Canker sores often improve within one to two weeks, but the recovery time may vary depending on lifestyle management.
- Get Sufficient Rest
Managing immunity is important for recovery from canker sores. Getting enough sleep and reducing fatigue may be helpful.
- Reduce Irritating Foods
Spicy, hot, and salty foods can worsen pain. While you have canker sores, it is best to eat foods that cause less irritation.
- Maintain Oral Hygiene
Although you should avoid touching the inflamed area excessively, it is important to keep your mouth clean. Neglecting toothbrushing may increase discomfort due to bacterial growth.
- Drink Plenty of Fluids
A dry mouth may delay recovery of the mucous membranes. Drinking water frequently can help keep the oral environment moist.
When Should You Visit a Hospital for Canker Sores?

Most canker sores heal naturally, but medical attention is recommended in the following cases.
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They do not heal after two weeks
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They continue to grow larger
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They recur repeatedly
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The pain is severe enough to make eating difficult
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They are accompanied by bleeding or severe swelling
In particular, abnormalities of the oral mucous membranes that persist for a long time may not be simple canker sores, so an accurate diagnosis may be necessary.
If Canker Sores Keep Coming Back, Check Your Oral Environment

If canker sores recur, it is a good idea to check for irritating factors inside the mouth rather than assuming that fatigue is the only cause. Chipped or sharp teeth, dental restorations that cause ongoing friction, and ill-fitting appliances can repeatedly irritate the mucous membranes and contribute to the development of canker sores. If your mouth frequently develops sores or inflammation repeatedly occurs in the same area, checking your oral condition may be helpful.
Minish Spa: Preventive Oral Care Is Also Important

If canker sores recur, it may be helpful to systematically examine and manage your oral environment rather than caring for them only after symptoms appear. 미니쉬치과병원’s Minish Oral Spa is a program that precisely examines each individual’s oral condition and comprehensively evaluates oral bacteria, plaque, gum health, and other factors to help prevent and manage oral diseases. Using the latest diagnostic equipment, it objectively analyzes factors that may affect oral health, including cavities, gum disease, and bad breath, and provides a preventive care program tailored to each individual.
If your mouth frequently develops sores or canker sores repeatedly occur in the same area, it is a good idea to check not only fatigue and stress but also irritating factors inside the mouth and your overall oral environment. Identifying the cause accurately and managing it systematically may help maintain oral health.
Canker sores are a common condition that anyone may experience at least once,
but if they occur repeatedly or do not heal for a long time, it is important to identify the exact cause.
If canker sores recur frequently or you are concerned about your oral health,
visit 미니쉬치과병원 to check your current oral condition through a consultation with a qualified medical professional,
and receive guidance on preventive care methods suited to you.

