What causes stabbing pain and burning after breast lumpectomy and radiation?

I had stage zero breast cancer and had a lumpectomy done. I had three removed incisions on both sides of my breast. Completed 16 rounds of radiation. Did not have to do chemo. I am a little over a month done with radiation and I just finished peeling and am healing but for 3 days now I have a stabbing pain on one of my incisions and can’t even touch my breast it hurts so bad and at night when I’m laying down it feels like my skin is ripping and burning. Any thoughts or suggestions??