Ahhh this is SO common postpartum, memang kesian! A few of my mum friends had the same thing, itching yang xnak hilang even after trying different creams, and some suspect it's related to hormonal changes or maybe friction from sweating + not drying properly during our hot weather. Since yours sounds severe and like eczema, definitely see your doctor or gynae to rule out fungal infection or other skin conditions, because kalau salah diagnosis habis je, treatment pun salah, they might suggest something stronger atau suggest a different approach altogether.