Woke up this morning and my arm was painful and swollen. Put my sleeve on and tried to carry on as normal. By lunch time it was really painful so took sleeve off and realised it was now very red!!! I rang the breast care nurse and she sent me straight to my Doc who has prescribed Antibiotics. She said it could be cellulitis. Never had it before,no rhyme or reason for it to have struck today. Any advice about what to look out for. I have marked my arm so I can see if redness spreads.