For most, a mastectomy is pretty straightforward, especially if no lymph nodes are involved. You will have drains which can be a thorough nuisance, easy to trip over so the solution is bags to put them in and to sling over your shoulder or, as I did, use deep dressing gown pockets.
You’ll be given an exercise list. It’s really worthwhile doing these, religiously. I did and had normal mobility in my arm in a matter of days. The difficulty in getting full mobility depends in part on the precise nature of your surgery but the exercises really do help.
I didn’t have reconstruction but others can advise. Oh and I really didn’t have any pain. My hospital was deeply wedded to pain relief, but it simply wasn’t necessary, I ended up
squirrelling away painkillers until the staff accepted that I was genuinely fine. I’m no stoic!! But I appreciated the concern.
Front opening pyjamas are helpful. Take your own tea or coffee if you are discriminating. My hospital served excellent meals but dinner was at 5 pm!! Books, phone, music - there’s time to fill.
I got a soft pad to wear in my (normal) bra before I left hospital. It was important to
me to leave looking much as I had on arrival! I didn’t need any change of bra because my surgical wound didn’t have any impact from my bra but a soft bra may be recommended.
My drains were removed before I left hospital but sometimes they are not and you will need to know the procedure for later removal.
Best wishes.