A visible abdominal bulge or feeling of weakness can develop after pregnancy, weight change or abdominal surgery. It may be most noticeable when sitting up, exercising or lifting. Common causes include rectus diastasis, an abdominal wall hernia or a combination of both. Although these conditions can look similar, they involve different changes in the abdominal wall and may need different treatment.
What is rectus diastasis?
Rectus diastasis is a widening of the connective tissue between the two vertical abdominal muscles. It can create a central ridge or dome when the muscles contract. Unlike a hernia, there is no true hole in the abdominal wall, although a small umbilical or epigastric hernia may occur at the same time. Muscle separation is common after pregnancy but can also affect people after major weight change.
Could the bulge be a hernia?
A hernia usually produces a more localised lump where tissue pushes through a defect. It may become more visible with coughing or straining and can cause discomfort. Incisional hernias arise through previous surgical scars, while umbilical and epigastric hernias occur along the central abdominal wall. Examination is needed because appearance alone may be misleading.
How is abdominal weakness assessed?
Your surgeon will ask about pregnancies, previous operations, pain, exercise and changes in the bulge. Examination assesses the abdominal muscles, connective tissue and any focal defects. Ultrasound or CT may be recommended if a hernia is suspected or surgery is being considered. Functional symptoms, future pregnancy plans and personal priorities are included in the assessment.
Treatment options
Rectus diastasis may initially be managed with specialist physiotherapy focused on breathing, posture and progressive core control. Surgery can be considered when separation is significant, persistent and associated with functional or contour concerns. A true hernia may require a separate or combined repair. The correct plan depends on whether the problem is muscle separation, a hernia, excess skin or several factors together.
When should I seek urgent care?
Rectus diastasis itself is not usually an emergency. Urgent assessment is required if a localised bulge becomes suddenly painful, hard or irreducible, particularly with vomiting or abdominal swelling, as this may represent a trapped hernia.
Frequently asked questions
Can exercise close abdominal muscle separation? Targeted rehabilitation can improve function and control, although it may not completely reverse a wide structural separation.
Is the bulge just excess fat? Not necessarily. Muscle separation, a hernia and skin or fat distribution can all contribute.
Should I wait until after pregnancy? Future pregnancy may affect the result of surgical repair, so timing should be discussed individually.