I bet it is just the skin stretching because they are getting bigger. It happened to me, too.
That's your skin tearing and stretching!! (Stretch marks) mine do it all the time and I'm 23 weeks! It will come and go! Lotion helps a lot!! Keep them hydrated to reduce stretch marks
Lots of stretchmark lotion. Try putting it all day everyday.
Drink water to keep your skin hydrated and stretch mark lotion .
I'm 15+2 and mine are sooo itchy. I've found a shower followed by lotion helps me.
I am using the cocoa butter lotion for stretch marks along with baby oil. Thank you guys.
I'm 13 + 2, and mine are itchy AND sore. Sometimes they are so tender that i wanna cry :-(