What is this “cord” like thing?

Sexual health
1

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I have this cord like thing on my penis. While soft I don't even notice it, but when I am hard it hurts like hell, to the point where I cant stay hard. its been there for about a week now. No clue what to do, can it be a STI?[](https://)
2

Could be a vein that gets swelled up during erection.

You should consult a urologist.

3

That is the plan, but until than I don't know what to do. Been overthinking it.

4

i would consult a urologist and have an ultrasound done.