How do you make thin short hair grow really fast?

There is really no way to make your hair grow any faster. Your hair grows about one inch every two months. Slightly less as you age maybe a tiny, tiny bit faster if you are younger. It does help to keep your hair healty by having regular check-ups by the doctor and eating healty. A thyroid problem can cause hair to fall out as well as different kinds of medications. Good luck on the hair.