Breast cancer after taking hormone blocking tablets

I think myself very lucky that I could avoid chemo.  Will be starting radiation soonish, have an appointment for CT scan next Friday and will be told then when.  I do have lingering problems with the lymph node wounds.  Had a bad infection, and 3 lots of antibiotics sorted it out.  However, over the last couple of days the wounds and surrounding area became pink/redish.  Not sure if it is the results of strain due to exercise to get my arms above my head for treatment or not.  Will check this week with the breast cancer nurse.