Obviously, the first thing to do is tackle the way you deal with stress so it' s not so much of a burden. When you are under pressure, take 1g of vitamin C three times a day. It' s best to take a less acidic form such as magnesium ascorbate, rather than ascorbic acid. You may also need more vitamin A, which strengthens the' inside skin' . Try supplementing 250meg (7,500iu) of vitamin A a day, as well as 15mg of zinc, which helps ulcers to heal.

Food allergies, to wheat in particular, can also trigger mouth ulcers; eating foods you' re sensitive to only every fourth day can help keep the allergic reaction at bay. Also, check your toothbrush. Splayed-out bristles, especially if you brush too hard, often cause the initial damage that leads to a mouth ulcer.