Sorry ,no real knowledge but imagine it is post-operative swelling which takes months to go down. The other thought is as you said,muscles not being used normally . Possibly both are the causes. Ask your doctor ,your surgeon. He/she should've explained this before ,I think.They don't seem to prepare some of us for all possible and probable side effects. They don't realise how much these things affect us emotionally.
Cancer Council NSW would like to acknowledge the traditional custodians of the land on which we live and work.We would also like to pay respect to elders past and present and extend that respect to all other Aboriginal people.