If you have cut your hair short then it is best just to leave it the way that it is and let it grow naturally. If your hair is thinning then there are lots of oils and products on the market nowadays that will quickly and effectively make your hair grow evenly. Wash your hair and scalp with an anti-dandruff shampoo to prevent your hair from thinning or scalp damage
Your hair can also grow faster by using natural hair products, i have tried one and after 2weeks there was great improvement. You can buy -Wild Hair Growth oil and mix it with Shea butter and coconut oil to get the best result. I bought mine online- www.dressmeoutlet.com.
You can check it out there or visit other online or traditional shops that stock the product.