Umbilical Hernia vs Rectus Diastasis: Differentiating Midline Abdominal Bulges

A bulge near the navel often suggests an umbilical hernia. But rectus diastasis — thinning of the linea alba between the two rectus muscles — can look very similar. The underlying problem is different and so is the treatment.

Quick answer

An umbilical hernia is a true defect; rectus diastasis is a widening of the midline connective tissue without a real hole. Examination usually differentiates them; ultrasound helps in unclear cases.

Umbilical hernia — findings

• Bulge that appears with standing or straining
• Shrinks when lying down
• Tends to grow over time
• Occasional pulling or mild pain

Rectus diastasis — findings

• A vertical 'ridge' along the midline when lifting the head
• Often after multiple pregnancies or rapid weight changes
• Widening gap along the midline without a discrete defect

Can both coexist?

Yes, especially after multiple pregnancies or major weight change. Closing only the hernia may not be enough; the midline must also be assessed.

Treatment

Small asymptomatic umbilical hernias may be observed; symptomatic or growing hernias are repaired, often with mesh. Isolated diastasis first receives physiotherapy; wide, persistent diastasis — especially with a hernia — may be repaired surgically.