Adema (can't pin point trigger)

I have low to reg. blood pressure and suffer from adema on the top of my feet and around my ankles to just above. I take maxzide 25/37.5 1 x day. My Dr. changed the maxzide to 40 mg. of lasix w/potassium chloride and I had a had twice the swelling from a severe side effect and tightness in my chest..all kinds of problems. So now I'm back to maxzide and am going to call my Dr. this next week. I have had adema for years and I am in shape, on the thin side and even when I workout I still have adema. It is so uncomfortable and barely get enough sodium that a person at my weight/height should get in a day. I get my blood checked and my sodium level is usually lower than it should be or normal. Is there anything I can do to relieve the swelling. The heat does make it worse soaking my lower legs in cold water is good but I was just wondering if anyone has tips to improve my quality of life here.