Are you struggling with painful sores inside your mouth that make eating, drinking, or talking uncomfortable? These common irritations, known as canker sores, can be more than just a minor annoyance—they can disrupt your daily life. In this guide, we explain common triggers, practical treatments you can try at home, and when it’s time to see a dentist. You’ll find clear definitions, typical symptoms, possible causes, home remedies and medical options, warning signs that need professional care, and simple steps to help prevent future outbreaks.

Contact Citrus Smiles Dental Studio today to schedule a dental exam near you at our Murphy dental office: (972) 472-8862, Wylie dental office: (972) 474-3849, Heath dental office: (972) 433-6500, Lucas dental office: (214) 785-8271, or our Irving dental office: (469) 845-9855. At your dental checkup, you’ll receive X-rays and an oral cancer screening, so you leave any of our Texas dental clinics with answers about mouth sores that won’t go away.

Canker sores, also called aphthous ulcers, are shallow ulcers that appear on the inner cheeks, lips, gums, tongue, and the soft tissues at the base of the mouth. They typically have a white or yellow center surrounded by a red border. Although they are not contagious, cankersores can cause significant discomfort, making eating, speaking, and brushing your teeth painful. For some individuals, these sores recur frequently, which can be frustrating and impact everyday activities.

Aphthous ulcers vary in size from tiny pinpricks to larger, more painful lesions. Many people experience a burning or tingling sensation before a sore develops. The painful ulcer then appears and can take anywhere from a few days to two weeks to heal, depending on your overall healthand the specific trigger. Common symptoms include:

Most canker sores heal in about seven to 14 days. Healing time varies — stress, nutrition, and overall immune health all play a role. If a sore hasn’t healed after two weeks or causes severe symptoms, it’s a good idea to get a dental checkup to rule out other issues.

There isn’t a single known cause for canker sores, but several factors are commonly linked to them. Knowing these triggers can help you avoid what sets your sores off and manage outbreaks more effectively. Even though mouth ulcers are common, researchers are still studying why some people get canker sores repeatedly, and others never do.

Emotional stress and physical trauma are frequent triggers. Stress can lower your immune response, making outbreaks more likely. Physical injuries — like accidentally biting your cheek, irritation from braces or dentures, or brushing too hard — can also spark a sore. This is why it’s important to visit your dentist for denture repair, orthodontic adjustments, and regular checkups for maintaining your dental appliance. Managing stress and protecting your mouth from injury can cut down on how often sores appear.

Low levels of certain vitamins and minerals — especially vitamin B12, folate, iron, and zinc — are linked to more frequent canker sores. A balanced diet supports immune function and healing. If you get canker sores often, consider talking to a healthcare provider about checking your nutrient levels and whether supplements might help.

There are several home remedies and clinical treatments that reduce pain and speed healing. Knowing your options helps you choose what’s best for the severity of your symptoms.

These simple home treatments can relieve discomfort and support healing:

Clinical studies have shown honey’s antibacterial, antiviral, anti-inflammatory, and antioxidant properties in acute moderate wounds and burns. These remedies work well for mild sores. If a sore worsens or doesn’t improve, reach out to a healthcare professional.

If canker sores are large, very painful, or recurrent, a dentist may recommend medical treatments. Topical corticosteroids (for example, triamcinolone acetonide) reduce inflammation and pain. Other options include antimicrobial rinses, topical analgesics, or oral medications for severe cases. These treatments can shorten healing time and help you get back to normal activities sooner.

Most canker sores heal on their own, but certain symptoms mean it’s time to see a dentist. Catching problems early can prevent complications and help find the root cause.

Contact your dentist if you notice any of the following:

Dentists usually diagnose canker sores with a visual exam and a review of your medical history. If ulcers keep coming back, your provider may check for infections, autoimmune conditions, or nutrient deficiencies. Management can include prescription treatments, dietary advice, and stress-reduction strategies to help prevent future outbreaks.

Preventing canker sores starts with gentle oral care and healthy habits. Small changes can meaningfully cut the number and severity of outbreaks.

Try these everyday practices:

Other helpful steps include:

With these simple strategies, many people see fewer sores and better day-to-day comfort.

Knowing what causes canker sores and how to treat them gives you control over your oral health. Between smart home care, targeted medical treatments, and support from your dentist, you can ease pain and reduce future outbreaks. If a sore is persistent, severe, or unusual, don’t hesitate to contact a dental professional for a personalized plan. Explore our resources or reach out to Citrus Smiles Dental Studio for help keeping your mouth healthy. Just call (972) 472-8862 for our Murphy dental clinic, (972) 474-3849 for our Wylie dental clinic, (972) 433-6500 for our Heath dental clinic, (214) 785-8271 for our Lucas dental clinic, or (469) 845-9855 for our Irving dental clinic.