Make sure you stop using any commercial hair products then you will want to use a natural hair growth booster. The best two are Mira hair gel and Mira hair oil
You want to try a product called Mira hair gel. It has hibiscus extracts which can help stop the thinning. The way you use it is to apply it on the thinning spots and it will grow your hair back. There is also Mira hair oil which helps stop hair loss and grows hair back fast. You can get it at http://www.grow-long-hair-fast.com/product.html