As per your query, we would request you to kindly perform the following steps to resolve your issue.
If your device is heating, decrease the screen brightness sometimes high brightness levels may cause the heating issue.
Too many apps installed on the device may cause the device heating issue. Uninstall the unnecessary apps if not using them.
Reset your Samsung smartwatch: Note: Before you perform a reset, make sure you back up the data on your watch using the Galaxy Wearable app. Samsung is not responsible for any lost data.
Unpair the watch from your phone. Navigate to and open Settings > Connections > Bluetooth. From the "Paired devices" list, tap the Settings icon next to your watch's name, and then tap Unpair.
Reset your watch: Swipe to and tap General > Reset > Reset again to confirm. For the Gear Fit2 Pro, tap Gear info > Reset Gear. For a Galaxy Fit, tap About band > Reset band > Reset to confirm.
Reconnect your watch: Once you reset your watch, you will need to reconnect it to the Galaxy Wearable app. After the connection is complete, you can check for software updates.
If you have an LTE watch that was activated with a QR code, a new one will be required to reactivate the service for the watch. Please contact your carrier to obtain a new QR code.
Update the software on the device (if available).
In case the issue still occurs please visit the service center for a physical inspection of your device. You can locate your nearest service center with this given link: https://www.samsung.com/in/support/service-center/
