I was naughty after my second mastectomy in November I was hanging Xmas lights on my front gutters with my drain bag over my shoulder which I put my cable ties and scissors in.... quite handy really as I was sick of sitting around!!! . Couldn't lift my arm past 90 degrees so was a good girl there so predominately used my left arm. I'm left handed anyway so that was fine. But as long as you have the seroma under control 2.to 4 weeks should be fine. Fingers crossed no chemo or rads for you too lovey. Talk to your gp oncol or surgeon about pain relief alternatives ❤️Margie