In HealthCare use of WSN: Wireless Sensor Networks in healthcare applications are growing in a past few years. And several applications used to monitor like heart rate, blood pressure, sound, temperature, and memory enhancement and etc., And Address the growing use of sensor technology in healthcare field a new invention known as wireless body area networks WBAN simply called as the BAN. In naturally the wireless sensor has security and privacy issues are among major issues and due to direct activity of people also increases the sensitivity. Whether the data collected from patients or etc obtained with the consent of the person or without it due to the need by the system, misuse or privacy issues may restrict people from taking advantage of the full benefits from the system. People may not see these devices safe for regular use. And there is a possibility of serious social unrest due to the panic that such devices may be used for monitoring and tracking individuals by the government and their agencies or other private sector organizations. In this paper, we discuss security issues and analyze in detail the problems and their possible measures and energy saving aspects.