13 Oct 2014
Blackmores Naturopath


Mouth ulcers

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Painful abscesses caused by the erosion of a small section of the tissue lining the inside of the mouth.

Also called

Apthous ulcer

Affected areas

Mucous membrane of the mouth.


Egg-shaped lesion with a white centre that can be very painful

These tender lesions can cause problems when brushing your teeth, chewing and can react painfully to any food that's sour, spicy or salty


The causes of mouth ulcers are numerous though most commonly they're caused some kind of self-inflicted mouth injury such as biting the inside of the cheek.

Here are some other causes of mouth ulcers:
  • Food allergies
  • Eating acidic fruit such as oranges, tomatoes and pineapples.
  • Viral/bacterial infections
  • Poor oral hygiene
  • Gum disease
  • Sinusitis
  • A deficiency of Vitamin B
  • Dysfunctional immune system
  • Poor digestion
  • Stress

Diet and lifestyle

Mouth ulcers are in most cases harmless and heal in just a few days but continued attacks are a good indicator of being run down.

To help the healing process along and to minimise repeat attacks do the following:

  • Eat a diet rich in red and yellow vegetables, whole grains and cereals, non-citrus fruit, lean meat and seafood.
  • Undertake moderate exercise, get out and get some fresh air and make sure you're sleeping well
  • Reduce stress through natural therapies and activities such as yoga or meditation

Whilst suffering from mouth ulcers, spicy foods and any food known to cause problems, such as acidic fruit, should be avoided.

Important notes

Consult your healthcare professional if the ulcers don't heal.

Get free personalised advice from our team of qualified naturopaths here

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This has been very helpful as my daughter 13 yrs has a very bad case of mouth ulcers and multiple ulcers on her tongue. I've given her zinc plus vit & a garlic horseradish & C tab so over time her immune deficiency will improve. She's had mouth ulcers before but never as bad as this. Should the dr give her some anti viral tablets?
Anonymous 19 Oct 2015
I've been eating mandarins lately for some vitamin C. This is probably the cause of my ulcer which is located just inside the top lip.
Anonymous 19 May 2015
I can handle the mouth ulcer but cannot handle the constant tingly throbbing tongue
Anonymous 06 May 2015
Hi Dudley,
Thank you for your post.
Sorry to hear that you are experiencing mouth ulcers.
The B vitamins work best when they are taken together – you might like to try either the Blackmores Mega B complex or Blackmores Executive B Stress Formula

We hope you can get some relief soon.
Kate 12 Jan 2015
I am having repetitive single mouth ulcers.
My general health is good but I am old.
I believe I have a vitamin deficiency.
Which of the B vitamins should I try?
Anonymous 08 Jan 2015
Dear Brian,
Thank you for your post.
I’m sorry to hear that you are experiencing mouth ulcers. Mouth ulcers are often caused by stress, a depleted immune system, and generally being run down – all of which may apply to you at the moment if you are undergoing radiotherapy.
As you are having radiotherapy you would need to discuss any new supplements with your healthcare professionals.
All the best Brian.
Kind regards,
Charmaine (Blackmores naturopath)
Charmaine 06 Jan 2015
Recurring mouth ulcers caused in part from the side effects of radio therapy
Anonymous 05 Jan 2015
Hi Karen, I am sorry to hear of your son’s recurrent mouth ulcers. Mouth ulcers are generally an indication of a compromised immune system .They may be caused by a specific nutrient deficiency , for example the mineral zinc. I would suggest you obtain a child-specific vitamin supplement that contains zinc, vitamin C and vitamin A.
Other vitamins and nutrients that are supportive of the immune system include vitamin D, iron and herbs like echinacea and olive leaf. It is fantastic that he loves his fruit and vegetables. Limiting refined sugar is important as well, due to its detrimental effect on immune function.
I would also suggest you take your son to a naturopath or integrative doctor to have a personalised consultation and any biomedical testing that may be required.
Please call the Naturopathic Advisory service for any further advice or support on 1800 803 760 .Kind regards, Rebekah (a Blackmores naturopath)
Rebekah 18 Jun 2014