How do I use the health of IOS8 and iPhone 6? Why should I enter my personal weight, birthday, height and blood type, as well as my consumption during activities?

1. First, open the health application on the home screen.

2. Click the medical emergency card below and select Create Medical Emergency Card.

3. Enter the relevant information and click Finish.

4. It is suggested to turn on "Show when locked", so that when your iPhone is locked, others can check your health by clicking "Emergency" and then pressing "Medical Emergency Card".