Wireless sensor networks (WSN) are a growing field with applications in different areas that include the Medical industry. Each application raises different concerns, challenges, and requirements. This paper looks at a Cluster in a Medical WSN, and focuses on the election of a Cluster Head (CH), its power consumption, and rotation frequency. The rotation of CH is important because it allows for a load-balanced cluster i.e. helping mitigate network energy consumption. In the implemented system, our work shows improvement in power/energy consumption compared to the related work.