Here are some possible reasons why your phone may be overheating:

1. Your phone is low on memory
2. Your phone has too many apps running in the background
3. Your battery is low
4. Your phone charger is not compatible with your device

Here are some possible actions that may help fix the issue:

1. Close any unnecessary apps
2. Restart your device
3. Charge your device and keep an eye on the charge level
4. Check if your charger is compatible with your device