Mouth Ulcers and Canker Sores: Causes, Differences, and Relief
Mouth ulcers are one of the most common reasons people search for quick relief, and for good reason. Even a small sore can make eating, talking, and brushing uncomfortable. At The Tooth Atelier in Sector 31, Gurugram, we see patients regularly who want to know why these sores keep appearing and how to get rid of them faster. This article explains the common causes, how to tell a simple ulcer apart from other oral lesions, and treatments that actually help.
What Causes Mouth Ulcers and Canker Sores
Canker sores, medically known as aphthous ulcers, are small, shallow lesions that form on the soft tissues inside the mouth, such as the inner cheeks, lips, tongue, or base of the gums. They are not caused by a virus or infection and are not contagious.
Common triggers include:
- Accidental biting of the cheek or tongue, or irritation from braces and rough dental work
- Stress and lack of sleep
- Acidic or spicy foods, citrus fruits, or certain nuts
- Hormonal changes, especially around the menstrual cycle
- Nutritional gaps, particularly low vitamin B12, folate, iron, or zinc
- Minor injury from a sharp tooth edge or a new toothbrush
- Certain toothpaste ingredients, such as sodium lauryl sulphate, in sensitive individuals
In some cases, recurring ulcers can be linked to underlying conditions like acid reflux, coeliac disease, or inflammatory bowel disease, though these are less common and usually come with other symptoms.
How to Tell Ulcers Apart from Other Oral Lesions
Not every sore in the mouth is a simple canker sore. Knowing the difference helps you decide whether home care is enough or a dental visit is needed.
Canker Sore (Aphthous Ulcer)
Round or oval, white or yellow centre with a red border, usually under 1 cm, appears on soft inner tissue, and is painful to touch or spicy food.
Cold Sore (Herpes Simplex)
Usually appears on or near the lips, starts as a blister, is contagious, and often follows a tingling sensation before it appears.
Traumatic Ulcer
Caused directly by biting, a broken filling, or a sharp tooth edge. It matches the location of the irritation and heals once the cause is removed.
Oral Thrush
Appears as creamy white patches rather than a single sore, can be wiped off partially, and is more common in denture wearers, infants, or those with weakened immunity.
Signs That Need Prompt Attention
- A sore lasting more than three weeks
- Sores that keep recurring frequently
- Unusually large or deep ulcers
- A lesion that is hard, thickened, or does not hurt
- Bleeding, fever, or difficulty swallowing alongside the sore
These signs do not automatically mean something serious, but they do mean it is worth having a dentist take a proper look rather than waiting it out.
Home Care for Quick Relief
Most simple canker sores heal within one to two weeks. In the meantime, these steps can ease discomfort:
- Rinse gently with warm salt water two to three times a day
- Avoid spicy, acidic, or very hot foods until the sore settles
- Use a soft-bristled toothbrush and brush gently around the area
- Apply an over-the-counter oral gel meant for ulcers to reduce irritation while eating
- Consider a toothpaste without sodium lauryl sulphate if sores appear often
- Stay hydrated and try to manage stress where possible
Clinical Treatments We Offer
If ulcers are frequent, unusually painful, or not responding to home care, a dental visit can help identify the exact cause and offer faster relief. Depending on the assessment, this may include smoothing a sharp tooth edge or adjusting a denture or brace that is causing repeated trauma, prescription-strength topical treatments for stronger anti-inflammatory action, and a check for nutritional deficiencies that may need blood tests through your physician. In select cases, laser treatment can numb the area and speed up healing of a stubborn ulcer.
| Treatment | Typical Range (INR) |
|---|---|
| Consultation and oral examination | 500 to 900 |
| Prescription topical medication | 150 to 500 |
| Minor dental adjustment (rough edge, filling) | 800 to 2,500 |
| Laser-assisted ulcer treatment | 1,500 to 3,500 |
These are typical ranges for Sector 31, Gurugram and can vary depending on the extent of treatment needed. We will always confirm exact costs after an examination.
When to Visit The Tooth Atelier
If you are dealing with a mouth sore that will not heal, keeps coming back, or seems unusually severe, it is worth getting it checked rather than guessing. Our team at Sector 31, Gurugram can quickly tell whether it is a harmless canker sore or something that needs a closer look, and guide you toward relief that actually works for your situation.
Have questions about your teeth?
The Tooth Atelier · Basement, C-3, Shrimati Santhosh Yadav Rd, Sector 31, Gurugram
Frequently asked questions
How long do mouth ulcers usually take to heal?
Most simple canker sores heal on their own within seven to fourteen days. If a sore lasts longer than three weeks, it should be checked by a dentist.
Are mouth ulcers contagious?
No. Canker sores are not caused by a virus and cannot spread to others. This is different from cold sores, which are caused by the herpes virus and are contagious.
Can stress really cause mouth ulcers?
Yes, stress is a common trigger. It does not directly cause ulcers but can weaken the body's usual defences and make outbreaks more likely, especially alongside poor sleep or a busy schedule.
When should I see a dentist for a mouth ulcer?
See a dentist if the sore is unusually large, keeps recurring, does not heal within three weeks, or comes with fever, difficulty swallowing, or unexplained weight loss.
Treatment costs mentioned on this page are indicative ranges for the Sector 31, Gurugram region. Your exact cost depends on your case and will be confirmed after a clinical examination at the clinic.