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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

So sick of mouth ulcers

85 replies

giddykipper3 · 17/05/2026 16:15

I get one maybe once a month or every other month. Sometimes mild, sometimes severe like the one I’ve got now. It’s not just the localised pain it’s the headache, fatigue and raised glands - my body is clearly fighting it and that takes its toll. I’ve tried everything - only use sensodyne toothpaste, use anti bac mouthwash, all the topical treatments you can buy. I had a full blood count done 6 months ago for something else and they all came back normal.

My dentist referred me to the hospital last year and they were very dismissive. Basically just said some people are susceptible to them and I should work on my stress levels 🙄

When I don’t have one I kind of forget how bad they are. But then I get a nasty one like I have on my inside cheek at the moment and I feel rotten for a week and think I can’t carry on with this. It’s been happening on/off for years.

OP posts:
goldielou · Today 19:35

I used to get them all the time until I was diagnosed with hashimotos/under active thyroid. Now I’m on medication I very rarely get them. May be worth investigating.

Brackenandbrave · Today 20:30

AzureLurker · 17/05/2026 23:56

I used to get major apthous ulcers, easily get to a cm across and last for several weeks at a time. Horrendous pain that no-one can understand these are not regular ulcers. You used to be able to get a steroid ointment from your dentist but they stopped making it. Only thing that worked for me until I found out I had dairy, yeast and benzoates allergies and gave all that up. Only used to be able to use McLeans toothpaste but can use some colgate versions nowadays due to the benzoates. I only get the odd one now from trauma like you say but not always. I could add a picture but nobody wants to see that! You can buy Orabase ointment online and crush up a tiny bit of steroid pill if you have any lying around, but I didn't say that.

The stuff that was discontinued was called Adcortyl in Orabase, and it was amazing. The active ingredients were triamcinolone actinide.

you can still buy it in other countries. Not in Europe to be knowledge, but definitely in Singapore, Thailand and Hong Kong over the counter. It was discontinued due to the cost, no other reason. Really worth buying some if you are ever in one of those regions.

another alternative is a steroid tablet dissolved as a mouthwash called Betametasone. Worth asking your dentist about this

DierdreDaphne · Today 20:40

Ineffable23 · 17/05/2026 16:46

The SLS in some toothpastes can give people mouth ulcers. Might be worth chucking a multivitamin into the mix as well. It is really annoying though, I used to sometimes get 10-15 at a time during my worst phases. I took to painting them directly with medicated mouthwash on the end of a cotton bud.

Yep, some sensodyne has sls (sodium lauryl sulphate) - in fact annoyingly I just bought a tube and won't be able to use it, as I know I will get a sore mouth if I do!

JennyChawleigh · Today 20:42

Smol toothpaste is SLS free.
smol.com/uk/stories/toothpaste-to-smile-about

Jerseymilkshake · Today 20:47

I used to suffer from mouth ulcers too. They're awful and so so so sore so you completely have my sympathies.
Anbesol liquid (not the gel) was the only thing that almost made them bare able but was still in a lot of pain.

Doctors fobbed me off for years!! Used to just say that it was potentially hormonal and I was clearly susceptible to them

However, 2 years ago I got a private allergy and intolerance test done (for other reasons) it came back that I have quite a lot of food allergies and intolerance. I originally cut them all out, but then gradually introduced them one at a time to say the affects.

Found out that it was tomatoes causing them, I occasionally eat tomatoes in some dishes in really small quantities but even a bolognese now means I get an ulcer. Have not had them at all since I cut them out.

It might be worth trying. Just a thought x

Jerseymilkshake · Today 20:50

I used to suffer from mouth ulcers too. They're awful and so so so sore so you completely have my sympathies.
Anbesol liquid (not the gel) was the only thing that almost made them bare able but was still in a lot of pain.

Doctors fobbed me off for years!! Used to just say that it was potentially hormonal and I was clearly susceptible to them

However, 2 years ago I got a private allergy and intolerance test done (for other reasons) it came back that I have quite a lot of food allergies and intolerance. I originally cut them all out, but then gradually introduced them one at a time to say the affects.

Found out that it was tomatoes causing them, I occasionally eat tomatoes in some dishes in really small quantities but even a bolognese now means I get an ulcer. Have not had them at all since I cut them out.

It might be worth trying. Just a thought x

Unexpectedlysinglemum · Today 20:51

Vitamin b

Lindorballs · Today 20:54

I get awful mouth ulcers too. Switching to SLS free toothpaste, enough sleep, keeping ferritin and b12 levels up, regulating cycles with hormonal contraception and treat them soluble betamethasone tablets or a steroid inhaler sprayed directly on them when I do get them have all helped. But it does make you feel so run down.

LorenzoCalzone · Today 20:59

I switched to Corsodyl toothpaste and now I only get them if i accidentally bite my gum

When I was young I had crooked teeth and think that agrravated my gums too

Florabeebaby · Today 21:12

Random but ask for a coeliac blood test. My dad suffered from constant mouth ulcers and was diagnosed coeliac in his early 60's.

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