I know you don't like meds or going to the doctor but have you had this check by a dr? Sometimes it can be caused by some pretty serious stuff like heart failure, thyroid disease, a fatty liver (cirrhosis--and that is NOT always caused by drinking), kidney disease, or it can be aggravated by simple things like too much salt, athritis meds, diabetes meds, estrogen, blood pressure meds and so on. PLEASE go talk to your doctor and find out why it is and what to do about it. About the only thing you can do at home is cut down on your salt intake and when laying down keep your arms and legs above your heart UNLESS that causes you to be short of breath if that happens then SEE YOUR DOCTOR. Support hose might help but who wants to wear those things in the summertime.
And no, I'm not a dr. or a nurse---I looked it up on the internet.