Intra-body communication (IBC) is a new, "wireless" communication technique that enables electronic devices on or sometimes near the body to exchange the information. It uses the dielectric properties of human tissues so that human body can be used as the communication channel for data exchange. Transmitting data directly through the skin is can be much more efficient than current wireless transmission technologies (Bluetooth, Wi-Fi), since it requires much less energy. In this paper the concept of Personal Area Networks (PANs) is presented to demonstrate how electronic devices on and near the human body can exchange digital information through the body. Various methods available for Intra-body communication are studied and presented. The advantages of this method over current wireless communication techniques are discussed along with possible limitation. The technology can have a wide range of applications, hence future scope of the system is presented.