Hey Pip
What you describe sounds like lymphodeama in your hand/arm. Is it in the arm you had your surgery? Have you had any scratches etc on that hand or arm. Have you had anything tight on your wrist such as bracelet, watch, elastic band and so on. Have you been on a plane or driven long distances?
Do you still have contact with your surgeon/breast nurse. Alternatively there are practictioners such as physiotherapists and bowen therapist that deal with lymphodeama.
I had my arm measured following my lumpectomy and total axillary clearance back in December 2011 and given a precautionary generic sleeve and glove sized to fit me as I was going to be flying to and from a holiday and driving long distances. When I was remeasured when i thought I had lymphodeama my arm had swollen so I was measured correctly for a sleeve and glove from somewhere like Germany.
Hoping that helps. You will need to see a practitioner to get a correct diagnosis and then if it is lymphodeama you will need regular lymphatic drainage done to settle it back down again.
Lots of love, Mich xooxoxxo