1. The mobile phone will have some heat when charging, which is normal, because in the charging process there will be a certain loss of electric energy, this part of the electric energy into heat will make the mobile phone and the charger to keep warm, such as the use of mobile phone temperature will be higher when charging.
2. If the phone is abnormally hot when charging, you can check whether the charger used is original, such as using other brands of high-current charger, the heat will increase when charging, it is recommended that you replace the original charger, and check whether there is software running in the background of the phone, if there is an attempt to close.
3. Using the original charger, the phone is charging abnormally hot, which may be a fault of the phone, it is recommended that you back up important data on the phone first, and restore the phone to factory Settings.
If the phone is still hot after the factory is restored, you can take the invoice repair card to the nearby service center, and professional engineers will help you detect and repair.