Hi girls I am on my 9th session of 20 (including booster) and I started feeling a bit sort of hard lump in the middle of my scar which I know they are blasting. Just wondered if any of you felt the same or any strange changes in the breast? I was told it could possibly be scar tissue so I spoke to the breast care nurses and they might give me an appointment soon to check. otherwise so far no major side effects and skin is feeling ok. 
Hi lulu. Think you will find it is scar tissue as I had similar but worth getting checked out. My boob around where the boosters were aimed are quite lumpy bumpy so giving a few more days for it to settle then go from there. I am 6 day post last zap and feeling good.
Thank you for your reply Gill. I spoke to the nurse again today and I felt better. She said to expect changes for the next 6 months. Also she said that 6 weeks after radiotherapy I will get an appointment to check the breast and if anything is suspicious it will be scanned. For now I just have to wait like you said for things to settle. It’s difficult to judge when everything feels different. Good to know it’s something others have experienced