Phimosis — This is when the extra skin that covers the head of the penis (foreskin ) is too tight. It can't be moved out of the way so you can see the penis head.
And the weird thing that I have been masturbating all my life with my penis head in the skin I mean my penis head has never been out, never ever. It somehow.
It's phimosis Consult Urologist online or near you for proper diagnosis and treatment.