@Alias1210 not sure what's your issue... are you trying to tell us that by using a tempered glass your display heat? This may be due the fact you use the display with high brightness and probably the protection you are using isn't an optimal choice for your phone.
Although this shouldn't provoke major problems, heat may render the screen more susceptible to scratch and breakage. You may want to low the brightness, or use a different protector for the display of your phone.
