extremley high pressure in colant system?

Hi all, can any1 tell me if its nomal to have extremly high presure in the coolant system wile engine running?

my radiator hose is so presurized it cant even be sqeezed!

I have just changed the thermostat whith no improvment, i dont even no if this is nomal on gti or not.

I can only think of 1 cause, Head gasket!

Please help, any info.

If u let the pressure out, does it pressurize straight away?

Have u tried a block sniffer test?

Whats ur coolant temp saying when its pressurized?

Does ur cooling fan come on?

I take it you bled the system?
take the rad cap off and the cap off the expantion tank and warm it up, youl know when its ready coz the top hose will get hot and you will see the water flow at the top of the rad, put the caps back on and its done

Or just flush it and use waterless coolant