I've had the same thing on my inner thighs for months.... I assumed it was from increased blood flow and vesodilation from increased nitric oxide production....
Thanks for responses but definitely not stretch marks I know what those look like this is more like a large area of red/pink not like stretch marks at all
Sounds like stretch marks to me too.
I have those too, I think those are stretch marks. I have them on my breasts and thighs lol