Hi there love. I actually didn't find the pain post op that bad it was more the numbness that was annoying. She will have a drain in too and should be given a shoulder bag to keep it in. She should also be given a little pillow to pop under her arm. I slept with that to stop the drain annoying me. She will be given plenty of pain meds if she needs them so don't stress there. She will also get some nerve pain too so keep up the meds if she needs them. Get her to rest when she can but also I got sick of lying around so if she feels like getting out in the sun do it. I went to the markets etc and it was nice to get off my ares and do something. She's not supposed to drive with the drain on but I did as I had no one to take me for my dressings.... actually I did but I was too bloody stubborn and independent to ask or take up the offers. Was determined from the start to not let it define who I am but in hindsight should of probably taken up that offer. Tell her to listen to her body and let her potter if she wants but be careful. She will get her results socn enough and a plan of attack if she needs one. I had 8 lymph nodes removed. Luckily all clear. Fingers crossed for your mum it's a big deal having a mastectomy but it's doable and to be honest I was glad it was gone - my boob that is. Feel free to come on here anytime and ask any questions you have. Sending you and your mum a big hug. Margie ❤️