Hi, My aunty was suffering from severe ankle pain she was undergoing few medicines but suddenly there was swelling in her both the legs its was so  sudden and day by day her swelling is increasing I don't know what is the reason she checked with doc they are also in confusion she got blood tested for kidney salt protein and diabetes too but it shows all normal doc was saying need to check heart and may be it is filaria can anyone pls tell what it may be how it has caused and its treatment