The itching is from your skin stretching! Use lotion or whatever you usually rub down your body with :p bio oil, whatever oil or moisturizer you have!
I know what your talking about and my doctor told me to use foot powder. I guess it depends where you have it tho. My boobs were so itchy I literally stuck my entire hand in my bra ANYWHERE i was and just went at it! It looked like I was starting a lawn mower I was scratching so hard lmao. So my doctor said to put a little foot powder down my bra from time to time
I would get some coconut oil and keep it moisturized
Try using lotion it mostly just from your skin stretching. I have to use lotion constantly bc my stomach itches so bad. But it helps relieve it once I put it on.
I just started getting that feeling a few days ago at 35weeks. What I do instead of scratching is just rubbing or get a wet cloth and rubbing my tummy with it