I was diagnosed with Triple Negative breast cancer in Dec 2018. I had surgery followed by chemotherapy and radiotherapy. Annual mammograms have been clear since then. Over the past week I have noticed a quite extensive redness on the underside of the same breast as the previous breast cancer. The breast is feeling a bit uncomfortable, possibly slightly fuller although I can't see any difference in size. The redness isn't itchy and the skin feels slightly dry but not rough. I am 65 years of age. I am a bit worried. Can you offer any advice please?