 [ Symptoms ] can colon cancer cause the inability to achieve or maintain an erction [ Disease ] perhaps i can put your mind at ease what you are describing as pus probably is not pus at all if it were your doctor would have given you different instructions is this pus a thick gooey yellowish fluid if so that is not pus it is actually a collection of excess protein molecules and wound healing components being created by the body to help your wound close up many patients see this yellowish goo and become alarmed thinking it is pus but rest assured it is not pus is usually greenish in color and has a very foul odor pus represents an infection and usually brings on a fever peritonitis is inflammation of the peritoneum which is a membrane that lines the abdominal cavity rarely does surgery cause peritonitis it usually is caused by an infection of the fallopian tube if you are otherwise feeling fine without a fever eating well and walking you can be pretty sure you do not have a post operative infection just attend to the wound as the doctor told you if by some chance you spike a fever be sure to call your surgeon is office wishing you well