When my radio finished I had awful lower back pain & slight skin discolouration there. Once the pain went I never really thought about it until I noticed my back in the mirror, the skin discolouration has gotten much worse, a dark brown, but no pain. Ive seared the threads for this & cant find anything so was just wondering if anyone else had had this or had any idea of what it is?

Surgery to remove tumour from on top of saliva gland 3rd August 09. Biopsy revealed adinoid cystic carcanoma. Further surgery 28th September 09 to remove saliva gland, nerve to top lip (buccal branch) & scar tissue.
Radiotherapy finished 30 Dec 2009 IXA x 33 (60gy).