This may sound bizarre but try rubbing your scalp with egg whites.
Crack open3 eggs drain the white, and message your scalp with it, let it sit for 10 to 15 mins before you shampoo it out.
Do not use hot water when you shampoo and rinse, use cool water if you can stand it.
Do not shampoo too often.. and although you may think it is dry skin , oils are not the best treatment.
Best part is that it is very common in teenagers, and usually goes away when you near your twenties.
And don't wear dark shirts