Hi,
I know this is an old post, but I wanted to reach out because I have this exact problem. I have tried both mag citrate and mag chloride (in the liquid added to my drinking water). Both cause terrible swelling in my feet and lower legs.
It took me a while to determine what was causing the edema so I continued with the magnesium and then I developed proteinuria (kidney related) which totally went away when I stopped taking the magnesium.
I am a thin athlete who eats very well so this edema symptom is strange for me.
I was wondering if you have the same problem with supplements that contain magnesium stearate. It is so hard to find supplements without it.
Also, taurine is excellent for those night time leg cramps. It works for me whenever I wake up with them, I just take 500 mg taurine and fall back to sleep with no further problems.
Please let me know if you have the problem with stearate. I really want to know.