A big no but feels good I should stop

I’m 34 weeks and recently noticed that on my very lower belly like under I’m getting stretch marks. I can only see them if I take a pic or if I rub my belly. But itching them feel good ik I shouldn’t but it’s like a relaxing feeling. Even though I lotion up many times a day. Even it’s not bothering me I just like the way scratching it feel. And I know that will make it worse. Any suggestions on how I can stop.