My daughter had goten third spacing during her pregnancy, had her baby and still has the third spacing and has very swollen legs and feet , need help

Talk to her doctor: The question is why she is third spacing. This can be a symptom of pre-eclampsia or can be due to a low serum protein level, or any number of other things. She needs to talk to her OB about the cause in order to know what if anything she needs to do about it. It can take some time for the changes of pregnancy to resolve after delivery. Hope this helps.