Abdominal
Diastasis Recti (Abdominal Muscle Separation)
What is diastasis recti?
Your two long abdominal muscles (the “six-pack” muscles, the recti) run side by side down the front of your tummy, joined in the middle by a band of strong tissue called the linea alba.
Diastasis recti is a widening and thinning of that central band, so the two muscles drift apart.
There is no hole and nothing pokes through — which is exactly what makes it different from a hernia, explained below.
It is most often noticed after pregnancy, as a soft bulge or ridge down the middle of the tummy when you sit up or strain — sometimes described as the tummy still “looking pregnant” months after delivery.
Diastasis or hernia — what is the difference?
- Diastasis: the central seam stretches wide, but stays intact. Contents cannot get trapped, so diastasis itself is not dangerous and never becomes a surgical emergency
- Hernia: there is an actual gap in the muscle layer, and fat or bowel can push through it — and can occasionally become trapped
- The two often occur together: a stretched central seam frequently hides a small umbilical or upper abdominal hernia within it
This is why an examination matters: a “diastasis” that has a hernia inside it may need a different plan than diastasis alone.
Who gets diastasis recti?
- Women during and after pregnancy — the commonest cause, especially with larger babies, twins, or several pregnancies
- Men and women with long-standing central weight gain
- People who lift very heavy weights with poor technique
- Anyone after major abdominal surgery or with chronic coughing and straining
What symptoms does it cause?
- A visible bulge or “doming” ridge along the midline when you sit up, cough or strain
- A feeling of weakness or lack of support in the core
- Lower back ache and poor posture in some people
- A tummy that does not flatten despite weight loss and exercise
Many people have a small separation with no symptoms at all — and need nothing done.
How is it assessed?
- Examination: your surgeon checks the width and depth of the gap while you lift your head and shoulders (a “finger-width” measurement), and carefully checks for a hernia within it
- Ultrasound or CT scan: used when the examination is unclear, when a hernia is suspected, or when surgery is being planned, to measure the gap precisely
- A physiotherapy assessment of core function often runs alongside, because muscle function matters as much as the width of the gap
Treatment without surgery: physiotherapy first
For most people, the first treatment is a structured core rehabilitation programme with a physiotherapist — not surgery.
- Deep core and pelvic floor retraining, progressed gradually
- Technique for everyday lifting, carrying children, and getting out of bed without straining the midline
- In the early stages, avoiding heavy sit-ups and uncontrolled straining that push the tummy wall outwards
- Weight management where relevant — less central weight means less pressure on the seam
Physiotherapy improves strength, support and symptoms for many people. What it cannot do is re-join a widely stretched seam — if the gap itself, or the bulge, is the problem, exercise alone will not close it.
When is surgery considered?
- A wide separation (commonly around 3 cm or more, or several finger-widths) with a persistent bulge despite proper physiotherapy
- Back pain and core weakness clearly linked to the separation and not improving
- A hernia present within the diastasis — the hernia itself needs repair, and the seam can be repaired at the same operation
- Significant distress about the appearance of the tummy after other options have been tried
Timing matters: repair is best once you have finished having children (a later pregnancy can stretch the repair) and your weight has been stable for some months.
The operation: plication (bringing the muscles back together)
The repair, called plication, folds and stitches the stretched central seam so the two muscles sit side by side again, restoring the wall's tension.
- It can be done through a traditional incision or by keyhole/endoscopic techniques in suitable cases; your surgeon will explain which fits your gap and skin
- If a hernia is present, it is repaired during the same operation, sometimes with a mesh
- If there is a large amount of loose excess skin, repair is sometimes combined with a tummy tuck (abdominoplasty) — that is plastic surgery, and your surgeon will advise whether referral to a plastic surgeon is the right route
- General anaesthesia; hospital stay is usually 1–3 nights depending on the technique
Recovery and realistic expectations
- Belly binder/support garment for several weeks, as advised
- Walking from the first day; no heavy lifting or core straining for about 6 weeks
- Desk work often at about 2 weeks; full exercise from about 6–12 weeks, rebuilt gradually with physiotherapy
- The tummy wall feels tighter and the midline bulge is corrected; back ache and core strength often improve
- Be realistic: the operation repairs the muscle seam — it is not a weight-loss operation, and loose skin or stretch marks are only changed if skin surgery is part of the plan
- A scar is unavoidable with open repair; your surgeon will show you where it will sit
Possible complications
- Fluid collection under the skin (seroma) — the commonest nuisance, sometimes needing drainage with a needle in clinic
- Bleeding or a blood collection (haematoma)
- Wound infection
- Recurrence — the seam stretching again, more likely with later pregnancy, major weight gain, or heavy straining too early
- Numbness of the skin around the scar, usually improving
Common questions
Can exercises alone close my gap?
Exercise strengthens the muscles and often improves symptoms and function a great deal — and it is the right first step. But a seam stretched several centimetres wide is a tissue problem, and exercises cannot stitch tissue back together. If a wide gap and bulge persist after proper rehabilitation, surgery is the remaining option.
Is diastasis dangerous if I leave it?
Diastasis alone is not dangerous and cannot strangulate like a hernia. The reasons to treat it are symptoms, function, a hernia within it, and how the bulge affects you — not fear of an emergency.
Should I have it repaired at the same time as other surgery?
Sometimes, yes — diastasis is often repaired together with an umbilical or ventral hernia repair. Combining it with unrelated operations is a case-by-case discussion about added operating time and risk.
Go to the emergency room immediately, then call your surgeon
- A painful, hard bulge that will not go back in, with nausea or vomiting (a trapped hernia until proven otherwise)
- Severe abdominal pain with a tender, swollen tummy
- After any repair: spreading redness, fever, or wound discharge
These are hernia and wound problems, not diastasis itself — but they are the emergencies that can occur in the same area of the tummy.
A final word
A tummy that never “went back” after pregnancy — or a midline bulge that appeared with weight gain — is a tissue problem, not a personal failure, and not something you simply have to live with.
Start with proper physiotherapy; if the gap itself remains the problem, a repair that restores the wall can be combined with hernia surgery when needed.
An examination will tell you honestly which group you are in.
Full guide written by Dr. Tamer Elalfy