Girls, here's a question: after giving birth, swelling immediately wen…

Girls, here's a question: after giving birth, swelling immediately went away, but on day three after delivery, they appeared, while during pregnancy such edema was not present as now they have appeared. In principle, it can be said that there were no edema from 30 weeks of pregnancy at all. They told me to drink triamphur, but I'm kind of scared, it's written that you can't take it with breastfeeding ?. Who has encountered this, what could it be related to?