What should you know about filling tissue expanders?

A tissue expander is a temporary device placed beneath skin and muscle, often after breast surgery. It has an access port that allows the clinical team to add sterile fluid. Each fill increases the device volume and gently stretches the surrounding tissue; the pace depends on healing, comfort and the reconstruction plan.

Tightness, pressure or temporary soreness can occur after a fill. The breast may feel firm and look uneven while expansion is underway. The expander is not usually the final implant, and the surgeon will explain when an exchange or another reconstruction step is appropriate.

Keep every appointment so the team can inspect the wound, skin and port before deciding whether to fill. Wear clothing that does not press on the area, take only pain relief approved for you, and mention discomfort before the next fill rather than waiting for it to become severe.

Follow wound-care and activity instructions, and protect the skin from pressure or injury. Breast reconstruction planning considers your previous surgery, radiotherapy, tissue quality and personal goals. The team can explain how an expander fits into the wider reconstruction pathway.

Call the surgical team promptly for increasing redness, warmth, swelling, drainage, wound opening, fever, worsening pain, sudden change in shape or skin colour, or fluid leaking from the wound. Seek emergency help for severe breathing difficulty, chest pain or fainting.

Ask how much fluid may be added at each visit, how long expansion may take, what soreness is expected, which activities are restricted, how radiotherapy affects timing, and what signs suggest infection or pressure on the skin.