My partner had a double by pass in March 2016.He returned to work 3 mnths later.It is 9 mnths down the track, and he is having a lot of pain in his back, shoulders, sometimes he cannot raise his arms above his shoulders.His leg where he had the vein harvested occassionally swells, particlarly the ankle. For the last 5 days the other leg, the good leg has been swollen from the knee down, and his ankle is very swollen also, he says it feels like it is going to burst, and is limping with it, is this from the surgery??