You can fix it by stop playing games. Please note that even computers heat up when you play games on them despite them having a heat sink and CPU cooling fan. Your mobile device does not have either.
mobile heating is normal while playing games but in samsung phones because of exynos it heated very faster than any other snapdragon powered phone. samsung flagship chips are way behind in gaming than sd midrage chips, this is true, we cant do anything. next time when you buy a phone dont buy exynos powered phone if you want good gaming.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > send feedback > error report/ask questions).
