There are several reasons why thalassemics might get edema (water retention). The biggest concern is, of course, poor heart function. However, if the heart tests out fine in T2* and echo tests, other possibilities should be considered. As I mentioned, a temporary increase in free iron has been seen to occur sometimes in combination therapy. The best thing that can be done if this happens, is up the desferal intake until things clear up and also make sure natural chelators like IP6 are being used. Poor leg veins can also cause water retention in the ankles and feet and this is a fairly common problem. Elevating the feet while resting can help. Getting up and moving around should be done if you sit for long periods or stand for long periods in one place. Walking does help improve this condition. I would also suggest some citrus be taken daily between meals, so as not to add to iron absorption. The veins need vitamin C for proper function so thals do need to make sure they get some C daily from their diet. This last one is very important. Stay hydrated at all times. Don't drown yourself but please make sure you get plenty of fluids and especially water every day. This is needed to eliminate toxins from the body and dehydration can actually cause edema.
I will appreciate feedback to see if any of these suggestions help those bothered by swollen ankles and feet.