Fatty diarrhea is the passage of greasy stools in the stool. In normal people, the amount of fat in the stool when excreted is less than 7g in a day, if the amount of fat is more than 7g/day, it is diagnosed as steatorrhea.

Chronic pancreatitis is a persistent, untreated pancreatitis that leads to permanent damage to pancreatic structures, fibrosis and duct compression, and impaired exocrine and endocrine function. Heavy alcohol use and smoking are considered two major risk factors for chronic pancreatitis.