My dad had a stoke like 8 years ago. When it jappened he lost his speech,the use of his right arm but was able to walk but the right leg Didnt work as good as the left. Now his foot is dragging badly he is getting weaker, more confused and i believe thata from the stroke.Now all of a sudden his legs are starting to swell,good side worse but swellare swelling and becoming painful I wondered if you could suggest what is going on with him please?