Background: According to Wessel, infantile colic is defined as excessive crying which lasts more than three hours a day for more than three days a week for at least three weeks in an otherwise healthy baby. Prevalence of infantile colic has been reported to vary within the 10-40% range in different studies depending on data collection, study design and definition of colic. Despite 50 years of research about infantile colic its etiology is unknown. Some causes are mother's stress under pregnancy, postpartum depression, social factors like mother's occupation and fulltime education and other factors such as lactose intolerance, cow's milk allergy, gut contraction and parentsinfant relationship.