Watch 4

[MartinC2]

Phone and watch no longer able to measure blood pressure 

[Kingfisher344]

Have you calibrated the blood pressure on phone and watch. This needs to be done first.

[MartinC2]

Phone no longer recognises watch in app

[JAMES4578]

Hi @MartinC2  Try rebooting by holding the Power and back keys for around 7 seconds.  It may be necessary to reset and  repair the watch again.  Some information here  https://www.samsung.com/Smartwatch Not Connecting  It is also suggested that users recalibrate Blood Pressure every 28 days for accuracy, if this is not done a prompt will appear at some point.  

Some Detail here   https://www.wareable.com/samsung/how-to-take-blood-pressure-on-samsung-galaxy-watch 

[Fiona26]

You could try wiping the cache for Samsung health monitor app. If that doesn't work, maybe delete data for the app and set the health monitor app again.

[maggie m]

Check the settings, if you might have made some changes to it.