Why is the iphone healthy and has no data?

In my "Health" application, no matter the number of steps, distance or floor, it is displayed as "No data".

This situation is mainly caused by a Bug in the system, just like the latest iOS8.2 system. At this point, we enter the steps of the detailed information interface, and then click the "show all data" option, as shown.

I still haven't seen any data here. Normally, all our data records will be listed here.

First of all, we can try to press the "Home Screen" button twice to start multitasking management, exit the "Health" application in the background, and then open it again to see if it works.

If the health application still shows no data at this time, please press and hold the power button of iPhone, and then turn it off and on again.

After restarting the iPhone, we open the "Health" application and can see that all the data is displayed normally again.