The stool color light yellow and white may be mainly caused by diet, biliary tract disease, need to clarify the cause, to give reasonable care and treatment. Common causes and treatment 1, dietary factors: If you eat too much milk or too little sugar, the fatty acids produced by combining with the minerals calcium and magnesium in food to form fatty soap, can also present grayish white, hard stools, generally by adjusting the diet can ease the symptoms; 2, biliary tract diseases: biliary obstruction such as gallstones, bile duct cancer, pancreatic head cancer and other diseases, resulting in blockage of the common bile duct, poor bile excretion, bilirubin can not Biliary obstruction such as bile stone, bile duct cancer, pancreatic head cancer and other diseases cause blockage of the common bile duct, poor bile excretion, bilirubin cannot participate in the formation of stool, resulting in grayish white stool, bile stagnation can also cause jaundice, abdominal pain and fever. Treatment is usually symptomatic, such as surgery to relieve biliary obstruction, and endoscopic choledochotomy for gallstones.