PMPS(Post Mastectomy Pain Syndrome.)

Hi everyone, I hope I have posted this in the right place it's been a while since I posted a message. 

I had left a post(or thought I had lol) about PMPS (post mastectomny pain syndrome) since I posted my message I have now been for my hospital appointment and checked over.

It's been 12 years since I had my mastectomy, firstly my operation followed by chemotherapy, radiotherapy,5 years of Tamoxifin, and 3 years Letrozol since then I've had no trouble at all until now I suddenly developed a swelling under my armpit it felt tingly and very, very itchy this went on for months and when it turned to pain along my mastectomy scar/shoulder and arm at times it was very painful so much so it affected my grip or applying pressure, lifting my arm which in my job(HCA) I need so at that point I thought I'd better have it checked out.

The consultant sent me for a scan(ultra sound) checking under my armpit and along my scar thankfully nothing showed,tested my blood but he said it sounds like you have pmps he explained it can happen in 30% of women(lucky me ) it's possibly something to do with the radiotherapy and damaged tissue in the surounding area, I can if I choose to have medication to help with the pain but I'd rather carry on without it, for now, I'll see how things go I can, of course, use creams such as Voltarol which does help. 

So my question is has anyone else experianced this?

Denise