You can check for diastasis recti at home with a simple finger-width test that takes less than a minute. A gap of about two finger-widths (roughly 2 cm) or more between your abdominal muscles is the standard threshold for a diagnosis. But the width of the gap is only part of the picture. How the connective tissue feels under your fingers and how your abdomen behaves during movement both matter just as much.
The Home Finger-Width Test
Lie flat on your back with your knees bent and feet on the floor. Place two or three fingers horizontally across your belly button, pointing down toward your pelvis, and press gently into your abdomen. Then lift just your head about an inch off the ground, keeping your shoulders down. As your abdominal muscles engage, you should feel the edges of the two muscle columns tighten on either side of your fingers.
If you feel a gap between those muscle edges that fits two or more fingers, that suggests diastasis recti. Repeat the test about two inches above your belly button and two inches below it, since the separation can vary along the midline. Research shows the widest gap is most often found at or just below the belly button.
Pay attention to more than just width. Press into the gap and notice what you feel. If the tissue between the muscles feels soft, squishy, or like your fingers sink in with little resistance, the connective tissue (called the linea alba) has lost some of its integrity. If you feel a trampoline-like tension pushing back against your fingers when you engage your core, that’s a sign the tissue is still functional. A narrow gap with poor tissue tension can be more problematic than a wider gap with good tension.
Visual Signs to Watch For
The most telling visual sign is called “coning” or “doming.” When you do a sit-up, get out of bed, or even lean back in a chair, look at your midline. If a ridge or tent shape pops up along the center of your abdomen, that’s your abdominal contents pushing through the weakened connective tissue between the separated muscles. This is one of the most reliable everyday indicators.
You might also notice a visible bulge or pooch in the lower belly that doesn’t respond to diet or exercise, or a belly that looks pregnant long after delivery. Some people only notice the separation when they’re in certain positions, so it’s worth watching your abdomen during different movements throughout the day.
Symptoms Beyond the Gap
Diastasis recti isn’t always just a cosmetic concern. When the abdominal wall can’t do its job of stabilizing your trunk, other areas pick up the slack. Lower back pain is common because the spine loses its front-line support system. Pelvic floor problems, including urinary leakage and pelvic organ prolapse, are associated with the condition because the abdominal wall and pelvic floor work as a connected unit.
Poor core stability can also make everyday tasks surprisingly difficult. Lifting groceries, picking up a child, or even rolling over in bed may feel harder than it should. If you’re experiencing these functional issues alongside a visible gap, that’s worth noting when you talk to a professional.
How Common It Is
Diastasis recti is extremely common during and after pregnancy. About 60% of women have it at six weeks postpartum. By six months, that number drops to around 45%, and by one year it’s about 33%. So while many cases resolve on their own, roughly a third of women still have a significant separation a full year after giving birth.
Pregnancy isn’t the only cause. Heavy lifting with poor technique, rapid weight gain or loss, obesity, chronic coughing, and general aging can all stretch and thin the connective tissue. Men develop it too, most often from carrying excess abdominal weight or repeated strain on the core muscles.
How Professionals Measure It
The finger-width test is a reasonable starting point, but it has limitations. Finger sizes vary from person to person, so a “two-finger gap” means something different depending on who’s measuring. Research shows moderate reliability when different people perform the test on the same patient.
Healthcare providers typically use ultrasound imaging for a precise measurement. Ultrasound is considered the gold standard because it shows both the width of the gap and the condition of the connective tissue. Calipers are another option with excellent accuracy, correlating very closely with ultrasound results. The European Hernia Society classifies diastasis recti into three grades: mild (2 to 3 cm gap), moderate (3 to 5 cm), and severe (5 cm or more).
A pelvic health physiotherapist can assess not just the gap but how well you generate tension through your connective tissue, which directly affects the treatment approach.
What Warrants Professional Assessment
If your home test reveals a gap of two or more finger-widths, or if you see consistent coning during daily movements, a professional evaluation gives you a clearer picture of severity and a starting point for rehab. This is especially true if you’re dealing with back pain, pelvic floor symptoms, or difficulty with normal daily activities.
Most treatment starts with targeted core rehabilitation, specifically exercises that train the deep stabilizing muscles to create tension across the gap rather than simply closing it. A structured physiotherapy program typically runs at least six months. For postpartum cases, clinical guidelines recommend waiting at least one year after childbirth before considering any surgical options, and only when the gap exceeds 3 cm, physiotherapy hasn’t resolved functional problems, and daily life is significantly affected.
One important note: avoid exercises that worsen coning. Traditional crunches, sit-ups, and heavy front-loaded movements can push the muscles further apart. If an exercise makes your midline bulge outward, that’s your signal to stop and find an alternative.