I had Level 2 node clearance on the 23rd of March (had double mastectomy on the 9th of March) I developed a seroma on the node op side. I got it drained by my surgeon 4 times since, the last being the morning before my first chemo (last Friday) It did refill but I started to massage it at night in bed for bout 15 minutes and it has really gone down well. A couple more nights and it will be fully dispersed and flat. I also wore one of those sports bras from target. That held it in or compressed it and I think that may have helped too maybe?!?! Good luck ☘️ Ps massaging it didn't hurt xx