Gallstones and the abuse of alcohol account for majority of pancreatic cases. Pancreatitis caused by alcohol abuse usually happens in patients who have abused alcohol for at least five years. The majority of chronic pancreatic cases are linked to alcohol abuse. Pancreatitis has often times already hit a chronic state by the time an individual seeks medical attention for the first time. Gallstones can clog up the pancreatic duct, allowing digestive juice to get inside of the pancreas. Pancreatitis caused by gallstones often happens to older women. The remaining cases of pancreatitis have multiple causes, such as injury, abdominal trauma, exposure to chemicals, medications, hereditary diseases, infections, intestine abnormalities, surgery or certain medical procedures and/or high fat levels. There have been cases of pancreatitis of which the cause is completely unknown.