Red Marks on the glands of my penis

Hey guys, I noticed these red lines on the glands of my penis. they have been here for about a week and cause mild discomfort. I don't know if they are a friction rub from using a blanket to masturbate or warts ... please help!

Here is a picture

I have a very similar mark bro. I have a few posts about it. Its in the exact same spot on opposite side of my penis head. Ive been tested for every STD other then Genital warts. But the health clinic doctor never brought that up when he seen it. Let me know any updates. Have you had unsafe sex recently?

… simplest approach is stop using the blanket, or completely abstain from masturbation for 2 or 3 weeks and see what happens
The photo does not show anything in particular - are you currently sexually active … ?