Apple Watch suddenly issued an alarm.

Are you asking why Apple Watch suddenly alarms? When the battery is exhausted and the user presses the sos help button, Apple Watch will give an alarm. Apple Watch will give an alarm when it encounters some emergencies, such as the sos help button being pressed or the battery running out. The user of Apple Watch presses the sos help button, the device is giving an alarm, and the system will start the countdown. Before the countdown is over, the user does not cancel the alarm clock, and it will automatically send out emergency help information with the alarm clock.