Q: health data not recorded

Hello TWIZTD_,

Thank you for using the Apple Support Communities!

Based on what you stated, it seems you are having issues with the Health App not retaining any data.  I enjoy using the Health App to keep track of my daily activity so I know how nice it is.  Hopefully, these steps will get it working again.

The first thing I would recommend would be to force quit the Health app:

Force an app to close on your iPhone, iPad, or iPod touch

If the issue continues after restarting the App, then shutting off and restarting the iPhone would be the next step: 

Restart your iPhone, iPad, or iPod touch

If the problem continues, you want to make sure you have a current backup of everything on your iPhone. If you follow this link, you will find instructions on how to do a backup: 

How to back up your devices using iCloud or iTunes.

It is possible that something has become corrupted and is causing the problem.  Once the backup is finished, I would suggest to reset all settings. 

Reset All Settings resets preference files that may be having issues. This step will not delete your contacts or photos or any personal information. It does remove all of your preferences for Wi-Fi, Bluetooth, Do No Disturb, Notifications, General, Sounds, Brightness & Wallpaper and Privacy, and removes your Touch ID & Passcode.

You do this by tapping Settings > General > Reset > Reset All Settings. 

Once the iPhone restarts, test out the Health app to make sure it is working correctly.  More information on the Health app can be found here:

Use the Health app on your iPhone or iPod touch

Cheers!

Hello TWIZTD_,

Since the issue is still occurring after the previous steps, we need to isolate the problem into either a hardware issue or a software issue.  To do this, we are going to want to restore the iPhone as new.  Since this will erase all the content on the iPhone be sure to have a current back up.

Once you have a backup, restore the iPhone as new, following these steps:

How to erase your iOS device and then set it up as a new device or restore it from backups.  

Be sure to set up your device as a new device rather than restore the device from the backup.  Once the iPhone is restored as new, test and see if the Health app is working.  If it is still not working correctly, then the best option would be to have the iPhone check out by an authorized service provider.  You can find the closest one by looking here:

Find Locations

 
If the Health app is now working, then go ahead and restore the backup using those same instructions:

How to erase your iOS device and then set it up as a new device or restore it from backups

This time, be sure to use the Restore your device instructions.

 
If the problem starts again, this would indicate that there is something being loaded from the backup that is causing the issue.  If that happens, you would need to set up as new again, and then install the apps that you need back onto the phone.

 
Have a great day!