My wife does this, and I have seen the new hair growth. She takes about 3/4 cup of ginger and chops it up really fine. Pounds it a bit. Heats it in the microwave until it is hot. Wraps it in a clean cloth. Then after washing her hair, she uses the wrapped ginger to massage her scalp for 5 minutes, reheating the ginger when it cools down. Leaves it on for 5 minutes and then washes it off. 3 to 4 days in a row. She said the first day the top of her head gets really hot, but the following days are not so bad.