Do people always have drains after mastectomy? If so, for how long?

I was diagnosed with ILC in 7/23. I had a lumpectomy in 8/23. I wanted a dbl masectomy from the beginning but was having resistance from numerous people because it was caught early. I agreed because I wanted the C out of my body fast. The more I learned about ILC being the sneaky cancer, my family history and the fact that I have dense fibrous breasts led me to seek out a surgeon to remove both. This happened 6 months later. I'm so happy with my decision. My mother had a lumpectomy in 2007, one breast removed in 2010 and the other in 2014. I have less to worry about now. My pathology report showed numerous pre cancers and ILC insitu in the same breast as the lumpectomy. I'm followed up with yearly masectomies. I had a skinsparing goldilocks masectomy which left me with tiny breasts so I'm not concave. In most cases you can have implants. My heart is with you. It's not an easy decision.