No sweating on surgery breast

Hi Dear Pink Sister...

I finished chemo in JUNE, and Radio in SEP, followed with Herceptin until next March, now is on the progress of Tamoxifen .   

I've noticed that my surgery breast was not sweat at all.  

I usually have a day walk and I sweat throughout, and also the hot flush caused by Tamoxifen, I'll wet through from head to toe.

However, I discovered that my right breast, which was my surgery breast was not sweating at all.

And it's a bit bigger, or swallon compare with another one.

I've checked with the nurse yesterday and they checked with Radio for me.  The Radio nurse advise it should be caused by the Radio treatment, it damaged the sweat gland and probably won't recover anymore.

Does anyone had the same issue?  Is it really never ever sweating anymore?

Regards