成日用負離子膏!!頭髮好傷!!有冇補救??

I cannot type Chinese. Sorry,

Your hair is natural curly, so you have no choice except you use flat iron to flat it every time after you wash your hair, blow dry and flat it. To avoid breaking, you need to dry it with blow dry first, put some moisturizer or hair repair (whatever name they call) and flat it out with flat iron. Remember, it is temperately straighten. Once you sweat, rain or wet your hair, it curls again.

If you want it straightens permanently, you need to use chemical straightening. You need someone who is professional (like me) to do it. Anyone who has not been trained can damage or burnt your hair. After chemical treated, you need to use good stuff to shampoo and conditioner your hair.

Pantene is cheap stuff to me. Sorry for that comment. They do not work.

Your 皮屑, I believe your scalp is too dry.