Its very upsetting for you and I 100% understand.
The same thing happened one of my children at 6.
Freak accident, with their father a couple of feet away.
My husband was deeply distressed by it for a long time.
26 stitches on their face.
I was definitely sick every time I looked at their gorgeous little face.
I followed the excellent surgeon's advice to gently massage the area every day with any oil or cream to bring blood to the area and aid healing.
There were a large number of witnesses to what occurred and the drama and blood involved was considerable.
Unbelievably the scar is now not noticeable and it doesn't register at all with me as I look at them 15 years later.
It was after 10 years that we noticed that it had disappeared.
Your childs youth at 6, same as mine is a huge factor in this.
I wish to goodness I had believed the surgeon that it would all be ok, it would have saved me fierce upset that I only shared with friends, so as to spare my poor husband, who was upset enough.
I think your husbands general laziness is a factor in all this and I can understand that.
She really will be fine, but rub the spot religiously would be my advice, and forgive yourself for not being able to master bi-location, as I had to! 😁