Incidence not known. 1  Chest discomfort. 2  difficulty swallowing. 3  hives or itching.  increased 1  sweating. large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs.  loss of 1  consciousness. noisy breathing.  slow or irregular 1  heartbeat. swelling of the  joints.
Keep in mind that your Apple Watch must be charged at least a little bit before will power on. How to turn off the Apple Watch. Press and hold the side button until you see the power down menu appear. Once it does, drag the Power Off slider to the right to turn the watch off.
How to enable Power Reserve mode. There are a couple of ways to enable Power Reserve mode on Apple Watch. You can swipe up from the bottom of the watch face screen, swipe to the Power glance, tap Power Reserve, followed by Proceed. Or you can simply press and hold the side button until you see the power down menu. From there, swipe on the Power Reserve slider to enable Power Reserve mode.