If nothing else the moisture on your belly keeps the itchies away.
You can use bio oil or cocoa butter but it's not proven they actually work. But can't hurt to try.
With my first my stretch marks looked like someone took a purple marker and colored my stomach. (Not over exaggerating) but now with my second you can barely see them. I never really used any lotion for mine because they would never work for me. But everyone is different. Good luck!
I'm on baby #3. And have very few marks. I stretch the skin on my belly daily... so it doesn't have to do it with rapid growth. I don't use lotions because they can actually irritate sensitive skin and make marks worse.
You cannot prevent stretch marks. You can buy expensive lotions/oils to help reduce them in appearance but that's about it.
Noooooo stracthin no matter how bad it itch