Hi. I Had Adrenal Tendois Surgery On My Ankle N

Hi. I had adrenal tendois surgery on my ankle n July. However, I have rehab but am experiencing a lot of swelling. I was given a prescription to buy compression stocking. I have not been able to fine any in my ity plus not sure of the size other than large no compression numbers given. I have started taking Numbeton, does this medication help elevate swelling? How long should I expect swelling to last with this type of surgery?