My dad just got whipple surgery 10day ago After surgery

Patient: My dad just got whipple surgery ago. After surgery there was too much fluid in his body.. and there is tow tubes to pulling out liquid 500cc /tube dailly.Now he is at hospital but develop a continuous leakage of yellow liquid from his wound 250cc every day .he has pain in the left side of his abdomen .Doctor tell us nothing to worry about. but water leakage did not stop.. I’m very much worrird about it Please reply to me . He is fabout ( 74 ) years old.He take albuomin,glocose, morphine or paracetamole dailly.