I had two drains but stayed in hospital for 4 days, and the drains were removed before I left. When I was in hospital they didn't cause much problem when I was sleeping (far more when I was showering as I tripped over them and yanked them a bit!). How long the drains stay is variable - depends on your surgeon's preference, degree of drainage, etc. I put them in my dressing gown pockets when I was moving about in hospital but many use a small bag. I heal quickly as a rule, and the mastectomy followed suit. Good luck.