Bile drainage of 200 milliliters per day is usually normal; if there is a sudden increase in drainage but there is no blood in the drainage fluid, it may also be normal, but if it is accompanied by bloody secretion then it is considered abnormal and may be related to biliary tract infection and residual stones. Bile drainage of 200 ml per day, but the drainage fluid is not turbid and there is no purulent reaction and no bloody secretion is considered normal. Because of the initial stage of bile drainage, usually about 200-300 milliliters per day, the current drainage is within the normal range. Under normal circumstances, after three days, the amount of bile will gradually increase, and the drainage flow can reach 500~600 ml. If there is no bleeding tendency or reddish color, it is considered normal. If there is a sudden increase in the amount of bile drainage, accompanied by mud-like, bloody secretions, etc., it is considered abnormal, which may be caused by biliary tract infection and inflammation during the drainage process, or may be caused by residual stones. Regular observation is recommended during the bile drainage period. Any increase or decrease in the amount, or any other adverse reaction should be promptly consulted, and targeted treatment should be provided in accordance with the doctor’s recommendations.