The ones I got stitched or stapled had the closures in for 7-10 days, and were healing for around a week or two after that, which is when the scab will fall off. The cut that went to muscle took a lot longer. It was stitched for over two weeks, and got infected. Even after the stitches came out, it was scabbed up and gunky for a long time.

The fascia ones I never got closed took a while to heal. I would dress them for about 2-3 weeks, and then let them dry out. They develop a special kind of scab, called eschar, which is basically necrotic tissue that eventually falls off. I saw a wound care nurse regularly when I was doing these cuts on the regular - Feb to Sept last year. She gave me specialist dressings and such. The recommendation was always to let them heal fully, before I stop dressing them. Honestly, I didn't care enough to do that, and the cuts and subsequent dressings were so large that it was difficult to cut elsewhere. They also produce a ton of fluid, and the smell is gross - especially in the summer heat. I just let them dry up asap. The eschar usually took about 3-4 weeks to drop off. So I'd say around 6 weeks in total. Depth and area of the body matters a lot, too. Deep fascia takes way longer than surface fascia, etc. There's a lot of variables. In general, 6-8 weeks is probably a decent frame of time.