Stretch Marks?

[SHaneA655]

I have no idea why i get stretch marks on stomach. I have NEVER had a belly and i have always been very cut so why would i have stretch marks. I have a visible 6 pack but i have these lines that go across my stomach? Any idea?? Seem like stretch marks?

Would taking prohormones or losing weight cause this? Sometimes its worse than others. Some fade in a few days and come back worse? Not sure

 

[brandon615]

I have these reddish lines across my stomach. They are more pronounced the day after an ab workout. I dont worry about em.