Hello C, sorry to hear you're in pain. I too had the same, radiotherapy to left breast but agony in right arm.  As Case has already said I think it was because I was relying more on my right arm to do day to day tasks and I was only sleeping on my right side. The radiologists had to physically lift and place my right arm during the sessions as I wasn't able to move it myself and it was agony. Hopefully, as time goes on your pain lessens, mine did quite quickly after the 15 sessions of radiotherapy finished. I'd speak to your clinical team and ask if you can take painkillers or if they have any further advice.

Good luck Liz

Hello C, sorry to hear you're in pain. I too had the same, radiotherapy to left breast but agony in right arm.  As Case has already said I think it was because I was relying more on my right arm to do day to day tasks and I was only sleeping on my right side. The radiologists had to physically lift and place my right arm during the sessions as I wasn't able to move it myself and it was agony. Hopefully, as time goes on your pain lessens, mine did quite quickly after the 15 sessions of radiotherapy finished. I'd speak to your clinical team and ask if you can take painkillers or if they have any further advice.

Good luck Liz

Thanks Liz. Was the same trying to get my right arm up and out of the "stirrups". Got some pain relief to take and trusting I've just overstretched or pulled something x