Bathmate discolouration

I am a complete PE novice and I am wondering if anyone can help me with a bathmate query. I am finding that my glans is darkened after pumping but it goes away quite quickly. Is this due to too much pressure, too long or is it not really anything notable? Thanks

Hey mate,

When you pump are your glans touching directly wall of tube?

Rubbing some baby oil before going in might help.

It’s normal to get a bit darker and if it clears up quickly then no problem, just watch out for changes long term.