@myhealthnow I had similar swelling in my legs with my right leg being worse but I have not had cancer treatment. I was diagnosed with lymphedema at Mayo Rochester when I had a lymphoscintigram test. Mayo Clinic has some information here on the diagnosis and treatment - https://www.mayoclinic.org/diseases-conditions/lymphedema/diagnosis-treatment/drc-20374687. There's no cure as far as I know but there are ways to control/reduce the swelling. My doctor prescribed knee high compression socks that I have to wear during the day to control the swelling. I've also found slightly elevating my legs at night helps. I put a folded blanket under the mattress to slight raise the bottom end of the bed.

Has your doctor suggested any type of treatment to reduce the swelling?