Glans purple because hitting the walls

Sorry, english is not my first language, the title of this thread could seems weird.

Anyway, I have a 1´75 inches tube, which I doesn´t pack yet, but my glans does , so, when I exit the tube, around my glans there is this purple color.

When I am erect my glans have this mushroom aspect a little bigger than my shaft, nothing extreme, that´s why my glans is hitting the walls of my cilynder.

So, I need to buy a 2 inches tube or it´s not a problem this brief time with my glans purple?

Thanks !

I’m guessing that it’ll be no problem temporarily. It’s most likely just extra blood flow to the area. Does it stay purple for very long?

A few seconds after I massage/jelq my banana.