Aphthous ulcers (canker sores) are commonly related to stress.
Hence the nickname “stress ulcers”.
Stress can suppress the body’s immune status by raising levels of naturally produced steroids in the blood. This can result in a number of disorders including mouth or aphthous ulcers. These ulcers are usually quite painful, often multiple and do not respond to orthodox medical treatment. They are not due to infection, and are not contagious.
Also known as "canker sores" aphthous ulcesr usually form on the "soft" areas in the mouth or near the gums. Although they usually disappear spontaneously without treatment after about 10 days, they can recur frequently in a percentage of patients.
Wheatgrass extract is a potent anti-inflammatory agent and is effective for relieving pain and for reducing the duration and frequency of aphthous ulcers.
To treat, insert two or three drops of wheatgrass extract in the mouth and hold it there for a minute before swallowing. This can rapidly ease or eliminate pain and even prevent further episodes.
Read more about aphthous ulcers. (Wikipedia)