One of the most common complaints from people with braces is that they cause sore spots inside their mouth. About 15 to 30% of people experience some mouth ulceration (sores) from braces, especially in the first week or two. These sores usually come from sharp bracket edges or protruding wires rubbing against your lips, cheeks, or tongue. The good news is that these sores are almost always preventable and treatable. This guide explains what causes them, how to prevent them, and how to manage them if they develop.
Who Gets Sore Spots and When
Most sore spots appear within the first 2 to 5 days after getting braces placed. About 20 to 25% of people develop at least one sore in the first month. Some people get them again throughout treatment, especially right after adjustments. Girls tend to get sores about 1.5 to 2 times more often than boys. Kids are actually better at healing than teens or adults, so the sores don't last as long for younger kids.
Several factors increase your risk of getting sore spots. If you have braces on the back of your teeth (lingual braces), your tongue rubs against them constantly, so you're more likely to get irritation. Larger wires cause more trauma than smaller wires. People with thinner soft tissues and thinner gums might develop deeper sores. If your orthodontist just adjusted your braces or changed your wires, that's when you're most likely to develop sores.
What Actually Causes These Sores
Three main things cause irritation. Sharp bracket edges can rub your cheek or lip and create a sore within 2 to 3 hours. The sore gets progressively worse as your immune system responds with swelling and inflammation. Protruding archwire segments—where the wire sticks out past the last bracket—can poke your lip or cheek, especially during eating or talking. Twisted ligature ties or elastic ties that don't fully hold the wire can also create sore spots that build up over days.
What These Sores Look Like
Bracket-related sores usually appear exactly where something sharp is rubbing. They're 3 to 10 millimeters in diameter with a yellowish-gray appearance and a red halo around them. They hurt most when your cheek or lip touches the sharp bracket or wire. Sores usually appear on your lips (75 to 80% of the time), on your cheeks at bracket level, the corners of your mouth, and sometimes on your tongue or the roof of your mouth. They're pretty easy to spot because they align perfectly with whatever is rubbing you.
Prevention: The Smart Approach
Your orthodontist should examine your brackets right after placing them to make sure edges are smooth. Sharp edges can be smoothed down, which reduces sore development by 60 to 70%. The archwire shouldn't stick out more than 2 millimeters past your back bracket. If it does, your orthodontist can trim and smooth it. At each visit, your orthodontist checks that your ligature ties (the little rings or wires that hold the archwire) are sitting properly and not sticking out.
You can also help yourself. In the first few days after placement or adjustment, be aware that your mouth is vulnerable. Avoid foods that are hard to chew or sticky.
Avoid poking the appliance with your tongue constantly. These behavioral changes really do help prevent sores. Many people unconsciously poke or play with their new brackets with their tongue, which can cause irritation. Try to keep your tongue away from the brackets in that first week—it gets easier as you adjust.
Quick Relief Options
If a sore develops, dental wax is your best friend. Press a small piece of wax over the sharp bracket or wire. It creates a protective barrier and usually lasts through meals. Silicone-based barriers (available over-the-counter) work similarly but last longer (8 to 12 hours instead of 2 to 4).
For pain relief, you can apply a numbing gel like lidocaine (over-the-counter at pharmacies) directly to the sore. It works in 5 to 10 minutes and lasts about 20 to 30 minutes. Antimicrobial rinses (like Listerine) help reduce the bacterial burden and might speed healing slightly. Warm salt water rinses feel soothing and you can do them 3 to 4 times daily.
Ibuprofen (200 to 400 mg) taken every 6 hours helps with pain and reduces inflammation. Most sores heal in 5 to 10 days if you protect them from further trauma.
How Long Healing Takes
Most sores go through a predictable healing pattern. Days 1 to 2 are when they hurt the worst as your body's inflammatory response kicks in. Days 3 to 5, the sore starts to close from the edges. By day 5 to 10, most sores are healed, though redness might linger for another week or two. With protective barriers, healing is much faster (5 to 10 days) than without (10 to 14 days).
Protective Barriers: Comparing Options
Dental wax is the most common protection. It works by creating a smooth barrier between the sharp bracket or wire and your mouth. Traditional wax lasts 2 to 4 hours (you lose it when eating). It needs reapplication multiple times daily, which gets tedious.
Silicone-based barriers are newer and work better for longer (8 to 12 hours). They're slightly more expensive but worth it for long-lasting protection. Some are designed as small caps that slide over individual brackets. Others are long tubes you press over wire segments. The key advantage is they don't stick to food and don't fall out when eating.
Orthodontic relief wax with fluoride adds cavity-prevention benefits. Some brands include benzocaine (numbing agent) built in, providing dual protection against trauma and pain. These cost a bit more but are highly effective for patients who can afford them.
Treating Existing Sores: Evidence-Based Approach
If a sore has already developed, first protect it from further trauma with wax or silicone barrier—this is the most important step. Without protection, the sore keeps getting irritated and never heals. Once protected, pain management matters.
Topical options: Benzocaine gel (20%) provides immediate numbing for 20 to 30 minutes. Perfect before meals. Hydrogen peroxide rinse (3% diluted to 1.5%) bubbles away dead tissue and bacteria, possibly speeding healing. Warm salt water (1/2 teaspoon salt in 8 ounces warm water) is soothing and promotes blood flow to support healing. Systemic medication: Ibuprofen (200 to 400 mg every 6 hours) reduces inflammation and pain. It works better than acetaminophen for this type of sore. Professional treatments: Your orthodontist can sometimes cauterize the sore with silver nitrate to speed healing, though this is rarely needed. They can also apply topical antibiotics or antifungal medication if the sore shows signs of infection (increasing redness, pus, fever).Recurrent Sores and Structural Problems
If you keep getting sores in the same spot after multiple attempts at protection, the problem might be structural. Common causes: a wire segment poking out at a sharp angle, a bracket that's tilted slightly and catching your cheek, or wear on the bracket surface creating a new sharp edge.
Solutions include: trimming and smoothing the wire (takes 2 to 3 minutes), repositioning the bracket, or filling the sharp edge with composite material temporarily. Some orthodontists now use special bonded barrier systems—they apply a smooth composite coating over sharp bracket edges. This lasts through treatment and completely prevents trauma at that spot.
Special Considerations for Lingual Braces
Lingual braces (on the back of your teeth) cause sores much more frequently than labial braces (front-facing) because your tongue is in constant contact. About 40 to 50% of lingual brace patients develop sores, compared to 15 to 30% of labial brace patients. Prevention is even more important with lingual braces.
Strategies for lingual braces: protective barriers are absolutely essential, start with smaller wires to reduce rigidity, avoid foods that require significant tongue contact with brackets, and practice not poking the brackets with your tongue (hard but important).
Age-Related Differences in Healing
Children (ages 8 to 12) have incredible healing capacity—sores heal in 5 to 8 days with good protection. Teens (13 to 17) heal a bit slower, around 7 to 10 days, possibly due to hormonal factors. Adults heal slower still (10 to 14 days), partly because bone density is higher and the inflammatory response is different. Older adults might take 2 to 3 weeks.
This is why early prevention is especially important for adults. What heals in a week for a child might take three weeks for an adult. Better to prevent the sore entirely than to wait it out.
Severe Cases and Treatment Breaks
In rare instances (less than 2 to 3% of cases), a patient develops severe, widespread sores that make eating, speaking, or sleeping difficult. This might indicate an allergic reaction to the bracket material or adhesive, or extreme soft tissue sensitivity. In these cases, your orthodontist might:
- Recommend a 1 to 2 week treatment break to allow healing
- Switch bracket materials (metal to ceramic, or vice versa)
- Switch adhesive systems
- Resume treatment with modified approach
If Sores Keep Coming Back
If you keep getting sores in the same spot, your orthodontist might need to reposition a bracket, use a smaller wire temporarily to reduce rigidity, trim the archwire shorter, or apply a smooth protective coating over the sharp area. These changes usually fix the problem completely. In rare cases where someone gets severe, widespread sores that affect eating or sleeping, a brief treatment break (1 to 2 weeks) might be recommended while the mouth heals, then treatment resumes with structural modifications. es-pain-and-discomfort-first-week-experience.html)
For more information, see Orthodontic Elastics: Force Delivery, Properties and Orthodontic Treatment Cost Analysis and Financial.
Every patient's situation is unique—always consult your dentist before making treatment decisions.Conclusion
Key Takeaway:> Key Takeaway: Bracket-related sores affect about 15 to 30% of patients early in treatment, but they're easily prevented with proper bracket smoothing and managed with dental wax and pain relief if they do appear—most heal within 5 to 10 days with appropriate protection.