When Minimally Invasive Diastasis Repair Isn’t Enough

Ironically, one of the most visited pages on my website is about minimally invasive rectus diastasis repair—through a small incision hidden in the belly button or by reusing a C-section scar. And yet, many of the patients drawn to this approach aren’t actually the best candidates for it.

Rectus diastasis occurs when the abdominal muscles separate during pregnancy, creating a gap between them. Small gaps may not need treatment, but as that separation widens, abdominal contents can begin to protrude. Patients often feel like they still look pregnant, even long after delivery. Core strength declines, posture suffers, and back discomfort can follow. Importantly, this isn’t something that can reliably be corrected with exercise alone—no amount of Pilates or core work will bring those muscles back together once the separation becomes significant.

When the gap becomes large—often around 5 cm or more—surgical repair involves bringing the muscles back together. But here’s the nuance that’s often overlooked: tightening the abdominal wall can actually make excess skin more apparent. Many patients expect their abdomen to look flatter, but if the skin has been stretched significantly during pregnancy, the result can be more redundancy, not less. In those cases, repairing the muscle alone may leave patients feeling like the outcome is worse, not better.

This is where candidacy becomes critical. Patients with excess skin, overhanging fat, a horizontal or widened belly button, or significant stretch marks often need more than just a muscle repair. Even patients who feel they “bounced back well” after pregnancy may still have underlying skin laxity and fat that limit their results with a minimally invasive approach.

The ideal candidate for a limited-incision repair is someone with minimal loose skin, a noticeable separation (typically more than three finger breadths), and often an associated umbilical hernia. Interestingly, umbilical hernias are far more durable when repaired at the same time as the diastasis, since bringing the muscles together reinforces the repair. If the diastasis isn’t addressed, recurrence rates for hernias can be surprisingly high.

Diagnosing a rectus diastasis can be simple, but many patients aren’t sure what they’re feeling. Lying on your back, lift your head and shoulders slightly as if starting a sit-up. Then press your fingers along the midline of your abdomen. You should feel firm muscle on both sides coming together. If instead you feel a soft gap where your fingers can sink in, that’s a diastasis. And instead of flattening, the abdomen may actually bulge outward with this movement.

For patients with excess skin and fat, combining rectus diastasis repair with a tummy tuck—either mini or full, depending on the degree of redundancy—often produces a far more balanced and satisfying result.

The takeaway is simple: the smallest incision isn’t always the best operation. The best result comes from matching the right procedure to the patient’s anatomy.