Hair oil comes in two major forms – in a spray or bottle. If it’s a spray, just spray it on and rub it in. You can even spray it on your head where you would like hair to grow, especially on the hairline.
If your hair oil comes in a bottle, put some into your hands about the size of a quarter. Rub your hands together and apply from the back of your neck and up. Try not to apply it from the front to back because it tends not to reach the roots. Just like the spray, you should put it on areas where you want hair to grow. If you’re balding, it can also weigh down your hair and make it seem greasy if you are not careful to apply just a little bit at a time.