Stretch marks or back scratches? HELP!

[YoungLady]

I'm unfamiliar with weight training, but my fiance occasionally lifts weights. Recently he had thin, red streaks on his upper back near his shoulders when I came home from out of town, which he attributed to weight lifting. The marks looked like scratches, but were below the skin. Can you help me determine whether the marks were from lifting weights or possibly infidelity? Also, can stretch marks disappear? PLEASE HELP!

 

[nectron101]

I had those red marks all over my body when I started gaining fat in a short period..

try to see if he has the same marks on his stomach, hips, and arms..

stretched skin marks can't be only in one part of the body, these marks appear in many places..

 

[Bench_It]

Calf machines will do it too....if you're doing a lot of weight, and your shirt gets wrinkled under the pads.

...squats can do the same thing.

 

[jeffreySyoung]

yep, calf machines or squats. I get deep red marks under the skin but they only last a few days.