Greetings. You need to understand that nature of the hair depends on the various bonds between amino acids in the hair cortex. These bonds can be broken and reformed during curling and straightening procedures, however, repeated hair procedures can may your hair shaft weak and prone for breakage. You must use a good shampoo and conditioner that are suitable for your hair type. Also try a new hair style or length thats suitable. Hope this helps. Warm regards

Curlyness is tendency of your hair when ever you do straightening it will stay only for some time and they will again curl. Noting can be done permanently U can use a good conditionar for silkyness