Bloody stools post colectomy, should i be concerned?

You don't : Say how many days post colectomy. Usually after colon resection you may see some blood with the first 1-2 bm's but after that you should not see blood. If you are you need to call your surgeon promptly and be evaluated. This can be very serious if not dealt with propmtly.

Depends: How soon since surgery. Initial bms can be bloody. See your surgeon.