Edema/retention

Does anyone have edema in the legs,espically lower part,feet,calves?with this heat,my edema is worse,so im wondering,what others do,take to help combat this?
i have read things,that it can be related to kidney disease,congestive heart failure.if you are taking meds for edema,what kinda,and ur dosage?
i am on Lasix,40mg,twice a day,metropol,and coversyle HD,amlidopine