Hair Thinning

Hi I am a 21yr old Chinese female. When I was 14, I began losing more hair than usual on a daily basis for a little over one year. I thought I was going bald. The hair loss was even, with a slightly more loss on the sides of the head.  Thankfully it stopped and shedding is normal now. However, I have to wash it and blowdry it upside down so it looks fuller than it is. I have to do this every time I want to wear it down, otherwise my hair is greasy and lays completely flat against my head, so I have to keep it in a high ponytail if I don't wash and blowdry it. I see my friends with thick, bouncy hair that stays like that even after a couple of days, and just wish I could have that so I wouldn't have to wash it every time I go out.

I guess my questions are:
1. Is there anyway to grow my hair back?
2. What should I do about the acne on my scalp? I don't have dandruff but my scalp is itchy and greasy after a day of being out.

[malissamellas]

To protect hair, the best method is to shampoo your hair only when your hair is dirty. Because fine hair will gets dirty faster, You can prevent thinning hair by improving your nutrition and exercise regime.  

Your metabolism can be affects the growth of your healthy hair. If you make healthy nutrition food and the habit of eating a well balanced diet, well supply of nutrients and fiber, you will get a good skin and the growth of your hair.