How to Stop Canker Sores – Change These 3 Things!

How to Stop Canker Sores

Canker sores suck.  They are painful, frustrating, and downright pointless.  I have had my run-around with them since I was young and was convinced that they were just a part of life.  Then, during my college years, things got really bad.   That’s when I decided to do a little research and figure out how to stop canker sores once and for all.

Now I am talking bad. It was like I was in a constant battle. Once one went away more canker sores started to come in waves, sometimes of 5 or more at a time.  Often they took days, sometimes even weeks to heal fully.  

Then, it was like before I knew it, a new round of mouth sores was on the way.

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This kind of narrative is probably familiar to most readers.  Canker sores are frustrating because they can actually get to the point where they can interfere with your enjoyment of daily activities.  Things, like eating, drinking, and even talking, can be painful and at times unbearable.

Why Do I Keep Getting Canker Sores?

How to Stop Canker Sores Mouth

I thought the same thing, and after I consulted my doctors, and dentists I got a variety of mixed advice that didn’t really lead anywhere.  Most said that besides staying onto of my oral hygiene, there wasn’t really anything I could do about my canker sores.  Again and again, I heard the same dreaded words, “They are just a part of life”.  So, I continued to brush my teeth multiple times a day and did all the normal precautions like avoiding acidic and spicy foods.  Still, I was in pain more often than not.

That is until I stumbled upon some advice that changed everything.

Sodium Lauryl Sulfate Toothpaste Causes Canker Sores

How to Stop Canker Sores Mouth

When most people read the ingredients on the side of a toothpaste box, they would probably would not give sodium lauryl sulfate (or SLS) a second thought.   SLS is a compound that was added to toothpaste in the late 80’s and serves no purpose other than to give you that white foamy consistency when you brush your teeth.

SLS gives you the illusion that the toothpaste is doing a better job and is nothing more than for show (they also add this stuff to shampoo to give you an idea of the effect they are going for…).  Other than for looks, it does nothing, I repeat NOTHING to actually make your teeth cleaner.

“SLS’s foaming action expands small cuts into canker sores.”
How to Stop Canker Sores Mouth

To many people, this is completely fine, as SLS is generally harmless, but to some people like myself, the foaming action can irritate any small cuts in the mouth and expand them into canker sores. So, as it turns out, by brushing my teeth regularly with everyday toothpaste, the very thing that I thought was helping my problem, was actually making it worse.

Since I found out about this, I immediately switched over to SLS-Free toothpaste and noticed a dramatic change in canker sores.

Keep in mind that canker sores go in approximately 2-week cycles, so it may take some time for things to clear up completely initially.   Overall, I would say that I have seen about a 90% reduction in canker sores, and now I only get them during times of high stress one at a time if ever.  I personally use Tom’s, but there are many other SLS free kinds of toothpaste out there.

Use SLS-Free Toothpaste

How to Stop Canker Sores SLS Free Toothpaste

View Tom’s SLS-Free on Amazon

Use Alcohol-Free Mouthwash

I also switched to an alcohol-free mouthwash which helps to cut down on irritation and burning.  Mouthwash is actually good for treating canker sores because it helps to clear out any bacteria or food that might be stuck, but it can hurt extra bad especially you already have sores.

ACT Alcohol-Free Mouth Wash

How to Stop Canker Sores SLS Free Mouthwash

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Stop the Sugar

How to stop canker sores sugar

Why do you keep getting canker sores? The likely culprit is your diet. As much as we hate to admit it, what we put in our mouth is the number one cause of canker sores and mouth ulcers. And the leading cause? Sugar.

Sugar hides in almost all the products we eat – sodas, juices, snacks, and even salad dressing. Make a habit of reading labels and pay attention to the foods you eat and if they contain sugar. You will be blown away by how quickly cutting sugar from your diet can stop canker sores from ever coming back.

Cut the Caffine

How to stop canker sores sugar

The other big canker sore cause is from caffeine. This is especially true for people who are allergic to caffeine or have a high caffeine sensitivity. Common foods and drinks that are high in caffeine and cause canker sores to include:

  • Coffee
  • Cola and Softdrinks
  • Tea
  • Chocolate

Not to mention the heat from coffee and tea, and the carbonation in soft drinks can further irritate and erupt new mouth ulcers. Instead opt for Herbal teas which are caffeine and sugar-free.

Treating Canker Sores

How to Stop Canker Sores

Like I said before, the simple act of switching to a SLS free toothpaste solved 90% of my mouth sores and I have not had much of a problem since.  But in those rare occasions that I am extra stressed out and feel a canker sore coming on, I have found some simple ways of treating them.  From my previous history, I have become somewhat of a pro for dealing with canker sores and have some remedies that work really well for me.


How to Stop Canker Sores Alum

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Out of anything out there, Alum is the one miracle remedy for making canker sores go away overnight.  It is nothing more than a cooking ingredient similar to baking soda.  What I usually do is mix it with a tiny bit of water to make a pasty solution and bad it on the sore.  Just let it sit for about three minutes and wash it away.

It will sting and doesn’t taste very good, but if you do this right before bed, then your canker sore will be practically gone if not completely healed by the next morning.

If you don’t have Alum at home, then baking soda also works well as an alternative, but I would definitely recommend giving Alum a shot. Also, if you have absolutely nothing else in the house, then swishing with salt water before bed works well too, although it stings and takes much longer to heal in comparison.

Take a Supplement

How to Stop Canker Sores Supplement

For some people, canker sores come on due to vitamin deficiencies.  If you aren’t already then it’s a good idea to take a multivitamin.  Research is debatable, but there is some evidence that getting extra Vitamin C can help protect against canker sores.

Also, L-lysine and L-Tyrosine are essential amino acid that helps to boost your immune system and can help to stop canker sores in their early stages.  I take one of each a day because they help with my energy and focus, but I will usually take two or three if I feel a canker sore coming on.


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l lysine canker sores

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Along with these changes, it is always smart to get enough sleep and maintain a healthy diet.  For people like myself, stress can be a major trigger, and of course, it always smart to follow the traditional advice of avoiding spicy foods or anything with high levels of acid like tomatoes and even citrus.  But, with proper care and a few changes in your oral hygiene you can kiss those canker sores goodbye.

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This is our guide for how to stop canker sores once and for all. Do you have any tips of your own? Let us know in the comments below.

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