Mouth Ulcers and Canker Sores: Causes, Relief, and When to Worry

Smiles By Dr. T · Sector 45, Gurgaon · Updated 2026-09-03

Almost everyone in Sector 45, Gurgaon has dealt with a mouth ulcer at some point, that small, painful sore that makes eating, talking, or brushing uncomfortable. While most ulcers are harmless and heal on their own, some people get them often, and a few sores need a dentist's attention. This guide explains what causes mouth ulcers, what actually helps at home, and when it is time to get checked.

What Causes Mouth Ulcers and Canker Sores?

Mouth ulcers, also called canker sores, are small round or oval lesions that appear inside the cheeks, lips, tongue, or gums. They are not the same as cold sores, which appear outside the mouth and are caused by a virus. The exact cause of canker sores is not always clear, but several common triggers are well known.

Common Triggers

• Accidental injury from biting the cheek, sharp food, or hard brushing
• Sharp edges on a broken tooth, filling, or braces rubbing against soft tissue
• Stress and lack of sleep, which can lower the mouth's resistance to irritation
• Certain foods such as citrus fruits, tomatoes, coffee, and spicy or salty dishes
• Nutritional gaps, especially low vitamin B12, iron, or folate
• Hormonal changes, which some people notice around their menstrual cycle
• Toothpaste with sodium lauryl sulphate, which irritates the mouth lining in sensitive individuals
• Underlying health conditions such as acid reflux, gut disorders, or a weakened immune system

Home Remedies That Can Help

Most simple ulcers heal within a week to ten days without any special treatment. In the meantime, these steps can ease discomfort and support faster healing.

• Rinse gently with warm salt water two to three times a day
• Use an alcohol-free antiseptic mouth rinse to keep the area clean
• Avoid very hot, spicy, salty, or acidic foods until the sore settles
• Switch to a soft-bristled toothbrush and brush gently around the area
• Apply a small amount of over-the-counter oral gel meant for ulcer relief
• Stay hydrated and try to get adequate rest, since fatigue can slow healing
• Consider a toothpaste without sodium lauryl sulphate if you get ulcers often

These measures manage symptoms and support the body's natural healing. They are not a substitute for a proper diagnosis if ulcers are frequent or unusual.

When Should You See a Dentist?

A single small ulcer that heals within a week or two is usually nothing to worry about. However, certain patterns suggest it is time for a dental evaluation rather than continued home care.

• The ulcer lasts longer than two to three weeks without improvement
• It keeps coming back in the same spot, often due to a sharp tooth or restoration
• The sore is unusually large, deep, or very painful
• You develop several ulcers at the same time
• Ulcers are accompanied by fever, swollen glands, or general fatigue
• You notice unexplained weight loss or persistent fatigue alongside frequent ulcers
• There is a hard lump, white patch, or bleeding near the sore

At Smiles By Dr. T in Sector 45, Gurgaon, our dentists first check for a local cause, such as a sharp tooth edge, ill-fitting denture, or braces component causing repeated irritation. If a dental cause is ruled out, we may suggest looking into nutritional levels or other underlying factors with your physician. Persistent or unusual ulcers should never be ignored, since early evaluation helps rule out more serious concerns and gets you the right treatment sooner.

Simple Prevention Tips

If you are in Sector 45, Gurgaon and dealing with mouth ulcers that will not go away, a quick dental check can bring clarity and relief. Call Smiles By Dr. T at +91 79482 24068 to book an evaluation.

Treatment costs mentioned on this page are indicative ranges for the Sector 45, Gurgaon region. Your exact cost depends on your case and will be confirmed after a clinical examination at the clinic.