You must be at least 17 years old to donate to the general blood supply, or 16 years old with parental/guardian consent, if allowed by state law. Learn more about the reasons for a lower age limit.
Other Causes of Elevated Heart Rate. Elevated heart rate when sick is actually your heartâs aid in order to quell the sickness. However, there can be other causes for elevated heart rate as well. Electrical signals produced and sent to the heart tissues are responsible for controlling the heart rate.
When you're sick, you body needs special care, not only in the form of extra rest but also in the foods you eat. Choosing foods carefully can help you to feel better faster, and is crucial because, although you might not feel like eating much at all, your body needs more calories to function when you're ill.