This paper presents a comprehensive IoT-based continuous health monitoring system specifically designed for diabetes patients. The proposed system integrates multiple biometric sensors including MAX30102 for heart rate and SpO2 measurement, DHT11 for body temperature, and a simulated glucose sensor, all interfaced with a Node MCU microcontroller. Real-time health parameters are transmitted to a Firebase cloud database for remote monitoring by healthcare professionals. The system incorporates role-based authentication for secure data access and automated alerts for abnormal health conditions. Experimental results demonstrate 98.2% accuracy in heart rate monitoring, 97.5% accuracy in temperature measurement, and reliable cloud data transmission with 99.1% uptime. The proposed solution addresses critical gaps in existing health monitoring systems including real-time continuous monitoring, multi-parameter assessment, and secure data storage.