help can anyone suggest a good work out for someone with lim

hi i have lymphademia and limpedemia my legs are very swollen and heavy i have tried exorscising but ended up doing more dammage than good to my condition i read a recent report that no diet or exorcise can help with this condition im trying very hard again as weight just piles on and people assume its because of what i eat i even blamed myself for years anyway i am un healthy so want to eat healthy and get fitter please if anyone can help let me know