Strange red lines on shoulders?

[spatts]

Bwahahahahha....

"civilians"

 

[Nonerz]

spotted some of those on my boyfriend the other day and my first thought was...gee, I don't remember scratching him there?!

 

[bignate73]

spotted some of those on my boyfriend the other day and my first thought was...gee, I don't remember scratching him there?!

 

[frenzyFYTA]

yea these marks are no big deal, just happen when you use machines that put lotsa weight on your shoulders, was kinda weird for me tho cause i do have stretch marks on my shoulders, then after i used a machine i was like whoa, i never thought i had this many stretch marks