iOS 14
Maintain a health profile in Health on iPhone
When you first open the Health app , you’re asked to set up a health profile with basic information such as your date of birth, sex, and blood type. If you don’t supply all of the requested information, you can update your profile later.
Tap your profile picture or initials at the top right.
If you don’t see your profile picture or initials, tap Summary or Browse at the bottom of the screen, then scroll to the top of the screen.
Tap Health Details, then tap Edit.
Tap a field, make a change, then tap Done.