>>11420760>We can even watch them formCould still be scratches. Your body doesn't react instantaneously to a light abrasion. Sometimes it can take a little while after you get scratched by something before your skin turns red or gets sore.
Anyway, that's the best guess I can make based on a blurry picture of somebody else and no other info. Do you have a pet? Are you obese? Do you wear tight clothes? Did you recently lose a lot of weight? There are plenty of potential causes for lines like that unexpectedly showing up on your skin.