Does anyone have any advice on getting rid of post op bulges?

Nearly 4 months after major abdominal surgery to remove a kidney & large tumour (they thought it was kidney cancer, but 8 weeks later when the histology finally came back I was told it was Liposarcoma Dedifferentiated) I still have some pain & discomfort which I expected; what I don't like is the bulging all around what is a large incision!

I appreciate it really doesn't matter in the scheme of things but it just feels like this - I can't control whether the cancer is still there (there were cells at the edge of the margin) and can't control whether it will metastasize, but maybe I can do something about this.

Maybe my age is against me (I'll whisper it, 68!) but I was fit, slim & annoyingly healthy, as my husband would remark on occasion, before this shock diagnosis.  The enforced inactivity post op was frustrating, but I have got back to doing my own housework & caring for my husband etc since (he suffers chronic widespread pain).