Is It Common for Breast Implant Incisions to Rip Open?

Thank you for your question and for sharing your experience with us.  Sutures tend to lose their integrity with every week that passes.  Scar tissue integrity tends to strengthen with every week that passes.  At some point, the dissolvable sutures placed superficially lose their integrity all together and the inherent strength the incision is not quite ready to take on all the stress alone.  It is for this reason I tell my patients that I tend to get most worried between weeks 2-4 as this is usually when there is no discomfort and activity levels start to increase and breast incisions may not be able to handle everything.

Massaging a scar makes no sense.  You have demonstrated a negative consequence of the maneuver.  Disrupting a wound at 25 days requires a good deal of force so you probably were very aggressive.  But even gentle massage is traumatic and causes the release of histamine.

Obviously, your massage techniques were more vigorous than your incision's tensile strength at 25 days! This could be because you did your massage too strongly, or because your incision had "poor" healing, bacterial contamination (the earliest stages of infection), because you had a closure whose strength was not reinforced by suture choice or technique adequately, perhaps bigger implant size than the optimal capacity of your breast skin, or a combination of all of these.

Incision breakdown is uncommon, but unless this is happening to lots of your surgeon's patients, it's no one's "fault."

It could happen again if you overstress the re-repair. I suspect your surgeon asked you to stop or reduce the vigor of your massage. He may have even re-closed your incision with an additional layer, stronger sutures, or more of them!

Just be careful and don't overdo anything until you are completely healed. Best wishes!