I had the same problem for my first kid on my 手腕 before and after birth. My doctor said is "infection" and gave me some cream to put on. But the pain didnt go away for months, and at last, I went to a "Chinese Tit Ta" to fix. The Si Fu said it's common for pregnant woman.
me too, pain at both wrists 2 weeks before delivery and still painful after 2 weeks after birth. Doctor said it's common and because the tendons ("gun") 脹大. It'll slowly recover. So don't twist your wrists and have them rest all time, otherwise the "gun" will 發炎.