Hi, I m 14 years old, and I see a single red line under my scrotum and it is scaring me. I ve noticed it ever since yesterday when I was in the shower. Please help me, I masturbate and besides that is the only thing I ve done, so I don t think it s an STD and i Pray it isn t cause i never had any sexual activity with anyone ever but myself. Please help me I m getting really scared, I can t even sleep right!