Okay, this brings up an old pet peave. At discharge from inguinal hernia surgery, I was handed a sheet of post-op instructions, which included taking a stool softener. I phoned a pharmacy when I got home, and the clerk said, "Sure, we have that, no prescription required. Just pop over and pick some up." I said, "Young lady, I just had surgery. I can't even hardly sit up in bed, so I can't just "pop over." I got some brought over to me the next day, by which time I needed it the day before. Then, to my dismay, I discovered the stuff took at least a day or two to start working. Why the hell didn't the pre-op info sheet I got before the surgery mention getting stool softener BEFORE surgery? Anyone who's had abdominal surgery knows that it's not possible to use your core muscles for some time. Even just a gentle cough or laugh is painful. So my advice: start taking stool softeners a couple of days BEFORE surgery. Save yourself some agony!
Oh, and here's some even better medical advice that my dad (doc) used to say, when I was wrenching on a car or other repair: "Never force anything, especially when you're constipated!"