What is this called on this person's legs?

It’s not from sitting on anything, this person’s legs are always like this. Are they veins? What is this non harmful skin disorder called?

And I don’t think they’re streatch marks either.

I’d guess spider veins.

Why don’t you think they’re stretch marks? That’s what they look like to me, and I have gazillions of them to compare to.

they look like stretchmarks t’me…

Looks like very early Ben Grimm Syndrome.