Mouth ulcers can be triggered by one of the more common chemicals found in many toothpastes, sodium lauryl sulphate (SLS) which is a foaming agent frequently used in shampoos too. Switching to a non-chemical toothpaste can help prevent recurring mouth ulcers which are actually the result of infection and subsequent inflammation of the delicate lining inside the mouth.
To tackle an existing ulcer, use a topical spray that will help soothe this inflammation. To prevent further outbreaks, take steps to support the immune system.
*Recurrent mouth ulcers can also be a sign of other serious underlying medical complaints so ask your GP for a check-up to rule these out.