OK, This may sound insane to those of you who know anything about medicine but what I would like to know is if there is a safe way to be dehydrated for a decent length of time? I'll give you some more information and then you can tell me if I've got hold of the wrong end of the stick. About 2 years ago I injured my back to such an extent that I required walking sticks to get around. I've no idea how I injured my back I just know that I woke up one morning and couldn't move and that the doctor insisted that I go onto painkillers and see a physiotherapist on a regular basis. Now comes the good news about ten weeks ago I woke up and there was almost no pain I was able to move my back reasonably pain free. So I stopped taking the painkillers as the doctor said however over the past 2 years I've put on a lot of weight, not all of it fat as for some reason since stopping the tablets my body is retaining fluid to such an extant that my ankles are the same size as my calf now I'm going to be trying exercise et to get rid of the extra weight but I was wondering if its possible to dehydrate myself in such a way that it gets rid of the excess fluid that my body is carrying in a safe manner. The doctor said that the fluid retention is a side effect of the tablets but wasn't able to suggest any way of getting rid of it other than "Gentle exercise" and to be far that might help in the long term but I want to get rid of it as fast as possible so any ideas?