In this technology savvy world, revolutionary innovations are emerging at a rapid pace. This stands pretty true with WSN giving way to WBAN that deals mainly with analyzing physiological signals of the body forming the network. As WBAN is related to the body of a living organism, its proficient knowledge is must and all safety issues need to be pondered upon to avoid any risk to the life of the organism under observation. Controlling congestion is one such issue of concern which demands attention of the researchers. Congestion control is the primary goal of the Transport Layer of WBAN. Not much work has been done in this layer as WBAN is still enjoying its nascency.