Dear Samsung Member,
Greetings from Samsung Customer Support!
Please perform the below mentioned steps to resolve the issue:
1. Uninstall the unnecessary apps. Too many apps installed on device may cause the device heating issue.
2. Long duration of graphics intensive gaming sessions may cause the heating issue. Avoid long gaming sessions.
3. Usage of mobile phone when charging may cause the heating issue. So we recommend you to avoid usage of mobile phone while charging.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > send feedback > error report/ask questions).
Thank you for writing to Samsung.
Warm Regards,Samsung Customer Support