Hair Whitening & Dandruff. Doctor.

Hi doctor, for the last few months, my hair started to turn white. An year ago, it was not the same, although I got white hair here and there on my head, but it caught to my attention. But now, the white hair started to spread and I could see a lot of white hair on head. I'm really starting to worry about this. Before taking the treatment, I would like to know whether there is a cure for this or not. Plus, I'm facing dandruff issue too these days. My head is itching sometimes and I kinda feel so irritated about it. Please kindly let if there's a cure for the aforementioned issues. Followed by, the kind of shampoo I need to use and home things that I can do for time being. I would really appreciate your advice, tips, and suggestions on my issues doctor. Thank you!