Thumb is really a special finger that we have in our body. It has some specific characteristics and purposes added to it. Without the use of the thumb you will find it very difficult to hold anything. For example try to write without the use of the thumb. Then you can find the difference. Not only this, thumb is the only finger that can be able to rotate around it. No other finger has that added feature. Almost in our every action of our hand the thumb will be used with or without our knowledge. So we should take a very special care of it. Hope you all like this small information.