Goldenseal mixed with salt and warm water can be used as a rinse to treat mouth sores. Deglycyrrhizinated licorice may be used as well, and can be made into a paste with saliva or eaten as a chewable tablet.
A quarter tablespoon of salt may be mixed with a cup of warm water and a half teaspoon of goldenseal to make a mouth rinse. Daily supplementation with vitamin B complex may aid in the healing of these ulcers as well. Propolis, a cement-like substance used by bees to make hives, is a natural antiseptic and may be obtained as a tincture at health stores. Deglycyrrhizinated licorice has specific healing properties for mucous membranes and can have significant effects on mouth sores. Slippery elm may aid in the healing process, and it can be ingested in the form of lozenges. Slippery elm extract may also be mixed with water to make a paste.
Alum powder, which is readily available in the spice sections of grocery stores, may be directly applied to mouth sores. This remedy will burn initially, but it promotes healing of the ulcer. Probiotics may help some individuals by replenishing good bacteria in the mouth and digestive tract, and those with mouth sores should avoid acidic, spicy or abrasive foods.