If you have silicone gel implants, they need to be removed and replaced. Those implants are most likely leaking or even ruptured. If you have saline implants and are having no issues, just enjoy them. If you are uncertain about what kind of implants you have, ask your doctor to order a mammagram or ultrasound.
Yes - you are overdue to change them out. By this time, there is a significant chance of leakage / rupture. A pre-op ultrasound can determine if this is a problem. Implant exchange, and possible capsulectomy, is a common outpatient procedure. Speak with a board-certified plastic surgeon in your area.
All the best,
Yes, you should consider having an open capsulectomy (scar removal) with implant removal or replacement since your implants are 30 years old.
Your implants are most likely dissolved and the silicone is now spread extra capsular. Removal or replacement is recommended
Most 30 year old implants are defective and should be removed with a total capsulectomy. Replacement is possible at the same time if there is no infection (bacteria or mold).