This topic is about someone who has recently had a loop ostomy reversal and is noticing that their 4-inch horizontal abdominal incision looks indented. They are curious if this indentation will smooth out over time or if it will stay as it is.

Here are some insights and advice shared by others who have experienced similar situations:

1. Many people have found that their abdominal scars do improve over time, but they often don't return to the completely flat appearance they had before surgery. Some level of indentation usually remains, even after several years.

2. For those looking to improve the cosmetic appearance of their scars, a couple of topical products have been suggested:
- Bio-Oil Scar Treatment, which is a commercial product specifically for scars.
- Vitamin E oil, which can be applied directly from gel capsules. This is a more affordable option and doesn't require a specific brand.

3. One person shared their experience of having both a surgical scar and an ileostomy site. Even after two years, both areas are still visibly indented, which suggests that while some improvement is possible, complete flattening is unlikely.