This report investigates the applications of big data in the healthcare sector, focusing on technologies such as Electronic Health Records (EHRs), real-time alerting systems, predictive analytics, Hadoop, NoSQL databases, data lakes, and in-memory databases. It explores how these technologies are utilized to improve patient care, streamline workflows, and enable data-driven decision-making. The report also identifies key challenges in the healthcare industry, including data capture, cleaning, and security, and proposes solutions to address these issues. The analysis covers the benefits of big data in areas like improving the delivery of care, and also addresses the complexities associated with integrating and managing large datasets within healthcare organizations. The report emphasizes the importance of data governance and the use of automated tools to enhance data quality and security. The overall focus is on the transformative potential of big data to revolutionize healthcare practices.