Just to add to what Andy has said, my PP level since SCT January last year stabilised at 24, I have not had any treatment since. They have only just started to go up but my Kappa light chains are well within limits, heamoglobin, lucozydes and platelets are all well within normal range. On this basis I will go back next momth for another blood test only.
My doctor did say that IgG proteins will increase in line with the lucozydes if someone has an infection that the IgG targets. e.g. cold or flu type illnesses.
I am sure your consultanty will carry out blood tests over a period of time to give a true reflection of what is going on.