My 75 year old mother is experiencing sudden onset of water retention in her legs and ankles. We have been to her primary and had blood drawn three times. At first her sodium levels were low.Now I worry she may have too much sodium. She also was prescribed Celebrex and it broke her out in a rash. I probably need to back up ~ she fell several months ago and the tear in her rota-tor cuffs in both shoulders didn t manifest until about two months ago when the pain caused her to go to her primary and then to a orthopedic. She had been very active before this injury. For some reason she has been having leg pain & that s when she was diagnosed with low sodium. She briefly took a supplement to replace sodium,potassium etc. I have reminded her to discontinue that. We are perplexed as to what could have caused the leg aching. Does low sodium cause leg pain and do some blood pressure meds cause low sodium?