Thankyou, that really helped :)
I will talk to my nan about getting her referred to a specialist.
Sorry to hear of your Nan's problems. I suggest the best move is to push for a referral to a vascular specialist. It sounds somewhat like the blood supply to her lower limbs is being compromised, and there may even be tailor made treatments that can be offered to improve her circulation. Regarding the uslcers, there is a wealth of research into products which aid recovery, such as silver dressings and even the use of maggots to eat the necrotic (dead) skin - seriously. You are right though to be concerned as to why she is getting the ulcers in the first place. Ask for this referral, there is enough going on to warrant it. Meanwhile the use of support stockings can reduce the pain and swelling in her legs and it important for her to keep her legs moving regularly, to encourage the circulation. It would be presumptious of me to jump in and make a provisoinal diagnosis as I don't have all the facts (plus am not a doctor), but do think a vascular specialist would be able to make that diagnosis, or at the very least offer better treatment than she is currently getting.