Why diastasis recti may bulge

It may look like a ridge or dome when sitting up, coughing, lifting or straining. The appearance alone does not show how well the abdominal wall functions or whether a hernia is present.

The two rectus abdominis muscles sit on either side of connective tissue called the linea alba. Pregnancy and other sustained increases in abdominal pressure can stretch this midline. When pressure rises faster than the abdominal wall can manage it, the tissue may dome forward between the muscles.

Diastasis is different from a hernia: it is a widening and thinning of the midline rather than a hole in the abdominal wall. They can coexist, however. A clinician can check a focal lump, pain or uncertainty about the diagnosis.

Notice which tasks produce a ridge, then reduce the load or change your technique. Roll onto your side before rising from bed, exhale during effort, avoid holding your breath, and keep objects close when lifting. Constipation management can also reduce repeated straining.

Exercise should build coordinated breathing, abdominal tension and pelvic-floor control without provoking pain or pronounced doming. A postnatal physiotherapist can assess strength, movement, symptoms and your goals, then progress exercises rather than relying only on the measured gap. Stop an exercise that causes pain, pelvic heaviness, urine leakage or a bulge you cannot control.

Arrange a routine review if the bulge is painful, limits activity, feels like a distinct lump, is getting larger or does not improve with adapted movement. Seek urgent care for sudden severe pain, vomiting, abdominal swelling, inability to pass stool or gas, or a firm tender lump that cannot be gently relaxed, as these can signal a trapped hernia or another abdominal problem.

Ask whether the bulge is diastasis, a hernia or both; which movements show reduced pressure control; whether pelvic-floor symptoms should be assessed; and how exercise can be progressed for lifting, running or returning to work. Mention abdominal operations and current bowel symptoms.