I had a mastectomy in February and have struggled with pain in my arm since. Also under my arm is extremely swollen and sore and rock hard. I have had it drained once a few weeks ago as the hospital said ithe cavityhad filled up with blood . When I told the care nurse that it had happened again she said to put ice on it as it is normal. ( She hasn't actually seen it as I haven't seen her since I had the operation) However that hasn't helped at all. Any other suggestions please?