To get started, here are the four main vital signs you will be recording: These can be recorded in a “vital signs flow sheet” that we will link to below that you can print a PDF version of. By monitoring these vital signs, we can get early warning signs of illness or injury and take action to treat them before they become serious. Vital signs are important because they give us an indication of how well our bodies are functioning. They tell us how well our organs are working and can give us early warning signs of illness or injury. Our vital signs are a measure of the health of our bodies.