The poisonous substance nicotine hidden in Tobacco will lessen the strength of sphincter muscles of oesophagus in the bottom which also causes addiction towards smoking. All of these will lead to excess of production of acid in belly alongside reducing the NaHCo3 Sodium bicarbonate release by pancreas which helps in balancing the production of the acid in stomach. Some of the usual Irritable Bowel Symptoms Irritable Bowel Syndrome is sickness which may be with the person throughout a day interrupting his daily routines. Though it is not harmful, sufferers have a feeling of let down which results in lot of stress and strain in their lives. Irritable Bowel Syndrome is a malady which needs to be noticed in the former stage itself, so as to take immediate action to get rid of it. Only during the year 1992, a measurable set of symptoms which was used to distinguish the disease was proved. Some of the things that need to be remembered about IBS are: 1) IBS is not life threatening: The syndrome is not fatal. People should know the truth that, they will never undergo death due to the Syndrome. The foods that may induce your appetite or for which you have a craving, can be avoided by setting a common diet. Your personal dietician or doctor will help you in charting a suitable diet plan for you, based upon the list you have made about the food that you eat. The most important food that you need to include in your diet is fiber rich food which will reduce your constipation, which is one of the common symptoms of Irritable Bowel Syndrome. So people always have the two options, either choose the insoluble fiber which is nutritious or suffer the pain or symptom caused by it, resulting in IBS or denying them completely. Even so, by eating along with the soluble fiber you can nullify the effect of insoluble fiber and thus can relieve from the pain of Irritable Bowel Syndrome, while still getting the same nourishment which a person requires, all of which talks you about the association of food and the Irritable Bowel Syndrome. It cannot be determined in a conventional way like x-ray, blood test etc. Since IBS is supposed to be much complex disorder, where the causes are not obviously derived and still in doubt whether they are due to the dysfunction of intestine or gut or because of the autonomous nervous system which cause alterations to the sensory operations and regulating the bowel motion.