Dear-thanks for using our service, I read your question with care and will give you my medical advise. It is important to use mosquitoes repelents,specially in persons like you that have very sensitive skin . The itching could be secondary to atopic dermatitis or dry skin. I recommend you to use aloe vera soap and apply lotion after the shower,to keep your skin hydratated and help the itching. If still like that,apply calamine lotion for the itching. You should have a checkup with dermatologist to evaluate the dark scars , however, they might be from scratching hard. I hope that my advise has been helpful Dr.JC