A double mastectomy is a surgery that removes both breasts, typically to treat breast cancer or significantly reduce the risk of developing it. The procedure takes at least a few hours on its own, and if breast reconstruction is done at the same time, it can last six to ten hours. Most people go home the same day, though some stay one or more nights in the hospital depending on the complexity of the surgery.
Why a Double Mastectomy Is Recommended
The most common reason is an existing breast cancer diagnosis. Some people with cancer in one breast choose to have the other breast removed at the same time, especially if they carry a genetic mutation that puts them at high risk for a second cancer. Removing the unaffected breast (called contralateral prophylactic mastectomy) reduces the chance of cancer developing there later.
The surgery is also performed preventively in people who have never had breast cancer but face very high risk. This includes carriers of harmful mutations in genes like BRCA1, BRCA2, TP53, or PTEN. Others who may consider it include people with a strong family history of breast cancer combined with certain precancerous findings, or those who received radiation therapy to the chest before age 30.
Types of Double Mastectomy
Not all mastectomies look the same. The type you have depends on the extent of the cancer, your anatomy, and whether you plan to have reconstruction.
- Simple (total) mastectomy: Removes all breast tissue, the skin of the breast, the nipple, and the areola. This is the most straightforward version.
- Skin-sparing mastectomy: Removes all breast tissue and the nipple, but leaves most of the skin over the breast intact. This makes reconstruction easier because the natural skin envelope is preserved.
- Nipple-sparing mastectomy: Removes all breast tissue while keeping the nipple, areola, and breast skin in place. This offers the most natural-looking result after reconstruction, but it’s not an option for everyone, particularly if cancer is located near the nipple.
What Reconstruction Looks Like
Many people choose to have breast reconstruction during or after their mastectomy. The two main approaches use either implants or your own tissue.
Implant-Based Reconstruction
This is generally a good option for people whose chest tissue has healed normally and who don’t need radiation therapy. Reconstructed breasts with implants tend to sit higher on the chest and feel firmer than natural breasts. The most common side effect is capsular contracture, where the body forms a fibrous membrane around the implant that can tighten over time. With saline implants, there’s also a small risk of the valve failing and the implant deflating.
Tissue Flap Reconstruction
This approach uses skin, fat, and sometimes muscle from another part of your body, most often the abdomen or back. Abdominal flaps work well for people who have extra tissue in that area. The surgeon transfers the tissue along with its blood supply to the chest, where the tiny artery and vein are reattached under a microscope. Back tissue (from a muscle called the latissimus dorsi) is another common donor site.
Flap reconstruction tends to produce softer, more natural-feeling results, but the surgery is longer and recovery is more involved. Possible complications include fluid collection under the skin (seroma) and, with abdominal flaps, changes to the appearance of your belly button that occasionally need corrective surgery.
Recovery: The First Few Weeks
After surgery, you’ll typically have one drain per side, sometimes two. These are thin tubes that collect fluid from the surgical site, and they stay in place for an average of two to three weeks. A drain is usually removed once its output drops below about 20 to 30 milliliters per day for two consecutive days. Special mastectomy bras are designed so you can pin the drains to them, which makes daily life more comfortable during this phase.
Lifting restrictions are important early on. You should avoid heavy lifting at least until your drains are removed. Raising your arm above your head on the surgical side can dislodge a drain or tissue spacer, so that’s also off-limits in the initial recovery period.
Your surgical team will give you specific exercises to start doing three times a day, typically gentle shoulder and arm movements designed to restore your range of motion. The goal is to keep doing them until you can move your arm the way you did before surgery, then maintain them once daily. If your shoulder movement still feels restricted four weeks after surgery, that’s typically when a referral for physical or occupational therapy comes in. Swelling that hasn’t improved within four to six weeks is also worth flagging to your surgeon.
Sensation Changes After Surgery
One of the less-discussed realities of mastectomy is numbness. In most patients, the chest skin and nipple area will be completely and permanently numb after the procedure. The nerves that provide sensation are cut during surgery, and for many people, that feeling does not return on its own.
A newer technique called breast reinnervation aims to restore some sensation by reconnecting nerves during reconstruction. For cancer patients, the return of feeling can take a year or longer, and chemotherapy or radiation tends to slow the process further. Transgender patients undergoing mastectomy typically begin regaining sensation around three months.
Lymphedema: A Long-Term Risk
Lymphedema, a buildup of fluid that causes swelling (usually in the arm), is a potential complication when lymph nodes are removed or damaged during surgery. It can show up at different times. A mild version sometimes appears within days of surgery and resolves quickly. Another form develops four to six weeks after surgery or radiation and also tends to go away.
The most common type is painless, develops slowly 18 to 24 months or more after surgery, and can become a chronic condition. The risk of lymphedema continues for the rest of your life after surgery or radiation to the lymph nodes. Early treatment makes a meaningful difference in preventing infections and keeping it manageable, so any new swelling in your arm or hand is worth reporting promptly.