Mouth ulcers

A mouth ulcer is an open sore which can be painful. They can be found anywhere within the oral cavity including the lips.

The most common causes of mouth ulcers are:

  1. Trauma e.g. irritation due to rubbing of a filling, a broken tooth, or orthodontic braces
  2. Recurrent aphthous stomatitis (recurrent ulceration)
  3. Cold sores (herpes labialis), commonly found on the lips or around the mouth


There could be some of the following factors associated with mouth ulcer(s):

  • Trauma (mechanical, thermal or chemical)
  • Stress
  • Iron deficiency
  • Vit B12 deficiency
  • Some certain foods make ulcers worse e.g. some types of chocolate, coffee, fizzy drinks, potato chips or spicy/hot foods.
  • Certain medications, sometimes multiple medications
  • And others

What it may need

  • Remove the trauma e.g. remove the sharp edge of the tooth or have the broken tooth repaired
  • Good oral hygiene can help prevent mouth ulcers. This includes brushing twice daily, flossing, and having regular dental checks (from $68) and hygiene cleans (from $90-180) at Gardens Dental
  • A blood test can eliminate a deficiency
  • You could speak to your GP to see if your medication is causing ulceration, and an alternative can be taken

Will the ulcers disappear?

  • Most mouth ulcers last 7-14 days
  • If the mouth ulcer has not gone within 3 weeks, please come and see me for a consultation ($68)

07 571 2861



38 Cliff Road, Tauranga, NZ
Phone: 07 571 2861