After giving birth, is it truth u cannot drink plain water and bath for the 1st 14 days? Why?

please drink a lot of water and stay hydrated ..as of me I didn't follow these rules...I drank warm , plain and sometimes even cold water. And hygiene is must even if you don't take a bath it's necessary to clean down there with warm water cause there will a lot of blood loss and you don't want your stitches to be infected. my gnae adviced me to clean down the area every time I use bathroom with cotton balls and betadine solution on it to prevent from infections..you can take a bath mommy ..I took it..I stayed at hopsital for 3 days and doc adviced me to take bath for hygiene.. it's all myths..if you have any doubt you can consult your gynae..of course they know about your body than anyone