Characteristics of abdominal pain - typically severe sudden onset, becomes constant, located in the epigastric region, right/left upper quadrant and may radiate to the back or flanks. Worsen with movement, alleviated leaning forward/fetal position, generalized with peritonism if peritonitis is present, if caused by gallstones can be sudden and knife-like and worse after food, alcohol-related, pain may be of less abrupt onset and poorly localized,