There’s no set frequency. Your provider will tell you how often you should change your dressing at home.
That holds for open surgical wounds, for closed surgical wounds (where your surgeon will tell you), and for venous and ischemic ulcers.
That is not an oversight. Frequency depends on the wound, the material and how much it is draining, and those are things an exam establishes.
What you can expect is a direction over time. As the wound heals, you should not need as much gauze or packing gauze. Less packing, not more, is what progress looks like.
There is one situation where you should change it sooner than planned. With a closed surgical wound, you will want to change the dressing sooner if it becomes wet or soaked with blood or other fluids. And on reuse the rule is clear: use a dressing only once, and never reuse it.
If the schedule you were given has become difficult, say so rather than solving it privately by stretching the interval. The frequency is part of the treatment, not a suggestion attached to it.
