Other reason is, in stressful situation either the person eats a lot or may not eat at all. In case of overeating, more and more acid is produced and in case of an empty stomach the acid makes the existing ulcers more critical. Excess stress may result in the erosion of stomach lining and the condition may become chronic. The person may have to face severe pain, burning sensation, nausea, vomiting, lack of appetite, etc.