| Hi, I don't know about removing scars that have been left.
About what causes them - have you found that one set makes worse scars than others? Do you leave sets in for more than 3 days? I find that certain set types, and leaving them in, increases the chances of trouble. With other sets, not left in, it's much more minimal and likely to go away. The key for me is making sure my set is not irritated as much as possible.
As for the inner thigh - you can only try, I guess. I had no luck with inner or outer thigh, but some success on the top of the thigh, about 5 cm/2 inches down from the bend of the waist.
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−− Type 1 since 1991
≈≈ MDI with Levemir and Novorapid / MM 722 Pump since 2007
~~ Metformin ER since Sep 2009 | 
