How To Get Rid Of Swelling In Leg?

Hi, may I answer your health queries right now ? Please type your query here...my father is 67yrs old..he had vercose vein problem and got operated for it..after 6b months of operation he developed cellulitis on same leg..he got hospitalized twice because of severe infection..now he infection is gone but swelling is not at all going ,,what to do ..pl help..