What are the causes of recurring oral ulcers?
Asked by:Meadow
Asked on:Apr 17, 2026 06:05 AM
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Christine
Apr 17, 2026
Although the oral ulcer is small, it is so painful that it makes people forget about food and drink and makes it difficult to speak. What’s even more troubling is that many people find that it always “comes back” and appears again within a few days of healing. Many people's first reaction is that they are "heated", but after taking a lot of medicine to clear away heat and reduce fire, the problem remains the same. In fact, there are often deeper reasons behind recurring oral ulcers. It may be your body sending you a health warning. So, why do oral ulcers always recur? How should we respond?
What are the causes of recurring oral ulcers?
1. Immune system dysfunction
Long-term stress and overwork will lead to a decrease in the activity of immune cells, which cannot effectively resist oral mucosal pathogens, making ulcers prone to recurrence.; Autoimmune diseases may also cause mucosal inflammation, leading to frequent ulcers, often accompanied by symptoms such as fatigue and susceptibility to colds.
2. Unbalanced diet structure
Long-term picky eaters and partial eclipses lead to a lack of B vitamins (especially B2 and B6), iron, zinc and other nutrients, which will affect the ability to repair the oral mucosa.; Frequently eating spicy, hot, and hard foods can repeatedly irritate the mucous membranes and induce recurring ulcers.
3. Improper oral hygiene care
If you do not develop the habit of brushing your teeth in the morning and evening and rinsing your mouth after meals, food residues can breed bacteria and cause oral inflammation.; Brushing your teeth too hard, using too hard a toothbrush, or using dentures, braces and other orthodontic appliances that rub against the mucous membrane may lead to recurring ulcers.
4. Work-rest and emotional disorders
Staying up late for a long time and not getting enough sleep will disrupt endocrine rhythms and reduce the body's ability to repair.; Negative emotions such as anxiety and depression can affect neural regulation, leading to vasoconstriction and insufficient blood supply in the oral mucosa, increasing the probability of ulcer recurrence.
5. Impact of systemic diseases
Suffering from chronic diseases such as diabetes, gastric ulcer, enteritis, etc. will affect body metabolism and nutrient absorption, and indirectly weaken the resistance of oral mucosa.; The side effects of some drugs (such as antibiotics and antihypertensive drugs) may also irritate the mucosa and induce recurrent ulcers.
How to deal with recurring mouth ulcers
1. Adjust diet and supplement nutrition
Eat more foods rich in vitamin B, iron, and zinc, such as lean meat, eggs, green leafy vegetables, nuts, etc., to avoid being picky eaters; Reduce the intake of spicy, hot, and hard foods. Chew slowly when eating to avoid irritating the oral mucosa. At the same time, drink more water to keep the mucosa moist.
2. Carry out good oral hygiene and care
Choose a soft-bristled toothbrush and use a gentle brushing method to avoid damaging mucous membranes; Rinse your mouth with light salt water or special mouthwash after brushing your teeth in the morning and evening. Clean your mouth promptly after meals to reduce food residue and bacterial growth. Dentures or braces need to be cleaned and disinfected regularly.
3. Adjust work, rest and emotions
Ensure 7-8 hours of sleep every day, avoid staying up late, and allow your body to fully repair; Relieve stress, regulate negative emotions, maintain a calm mind, and reduce the impact of emotional fluctuations on the oral mucosa through exercise, listening to music, meditation, etc.
4. Timely intervention and medical treatment
When ulcers occur, use oral ulcer powder, special gel and other medicines to relieve pain and promote healing. Avoid touching or tearing the ulcer surface with your hands.; If the ulcer occurs more than three times a month, does not heal for a week, or is accompanied by fever, rash and other symptoms, you need to seek medical attention promptly to investigate the cause.
Stop simply classifying repeated oral ulcers as "excessive heat". Only by dealing with them scientifically can we truly cure the root cause. If the ulcer does not heal for more than 2 weeks, is large in area, has severe pain, or is accompanied by fever, rash and other symptoms, you should see a doctor as soon as possible to investigate the disease.
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