yes it's safe to soak your feet in epsom salts but i am not sure this will really help your swollen feet. please talk to your ob-gyn about this issue since swollen feet during pregnancy is something that may need to be addressed medically. make sure you are elevating your feet as much as you can (good excuse for taking it easy this last month. you are going get quite busy soon! ) and closely watch your salt intake. some special compression socks may be helpful.
i am 8 months pregnant and my feet are swollen and was wondering if it is safe to put epsom salt in my bath to soak in?