As you have rightly pointed out, facial scarring / mederma is a very discomfit and painful experience, especially if you have such sensitive skin. However, you should remember that quite often, skin scarring / defacing due to insect bites is imperishable. Hence, while you might not be able to prevent the scar altogether, you might be able to work on some useful tips to lighten them. In addition, if you eat the right foods during your healing period, you could try and prevent the scars from forming. For example, Eating high vitamin C content, you could cure wound much faster than normal and wounds that heal quickly are less likely to leave scars. Try eating foods that are rich in zinc to promote quick healing.
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Home Curing To Treat Insect Bites Scars