What is an umbilical hernia in a dog?

It is a defect in the closure of the abdominal wall at the site of the umbilical cord. Through this gap, fatty tissue or — in serious cases — loops of intestine can protrude, appearing as a soft lump near the navel. It is most commonly detected in puppies during their first vet check.

Are umbilical hernias dangerous in dogs?

It depends on the size and contents. Small hernias (under 1 cm) containing only fat are generally benign and many close on their own before 6 months. Large hernias or those containing bowel can develop strangulation (loss of blood supply to the trapped content) — a surgical emergency.

Can an umbilical hernia close on its own?

Small hernias (under 1 cm) can close spontaneously in the first 3–6 months of life. Those that persist beyond this rarely self-resolve and should be assessed for surgery. Large hernias never close on their own.

When is an umbilical hernia an emergency?

When the lump becomes hard, hot, painful or changes colour to red or purple — these are signs of strangulation. If the dog is also vomiting or very unwell, go to an emergency vet immediately.

Umbilical Hernia in Dogs: Symptoms, Sizes and When Surgery Is Needed

What Is an Umbilical Hernia?

During fetal development, the umbilical cord passes through an opening in the abdominal wall. After birth, this opening must close completely. When it does not, a weak point remains through which fatty tissue (omentum) or, in serious cases, loops of intestine can protrude. The result is a soft, usually reducible lump near the puppy's navel.

Why Does It Happen?

The most common cause is hereditary: certain breeds have a genetic predisposition, including Airedale Terriers, Basset Hounds, Beagles, Pekingese and Weimaraners. Less commonly, excessive traction on the umbilical cord during delivery can cause it. It is the most common congenital abdominal defect in dogs.

Classification by Severity

Reducible hernia: the contents return to the abdomen with gentle pressure. Usually only fat. Lower immediate risk.
Non-reducible (incarcerated) hernia: the contents cannot be pushed back but blood supply is intact. Requires monitoring and probably surgery.
Strangulated hernia: blood supply to the herniated contents is cut off. Surgical emergency. Signs: hard, hot, painful lump that turns red or purple, vomiting, sudden deterioration.

Diagnosis

Your vet will palpate the lump and assess its size, whether it is reducible and what it contains. For larger or unclear hernias, an abdominal ultrasound is performed to confirm the contents (fat vs. bowel) and rule out complications.

When Is Surgery Needed?

Small hernias (<1 cm) in puppies: wait until 3–6 months. Many close spontaneously. If they have not closed by the time of spay or neuter, repair during the same anaesthetic (no additional anaesthesia cost).
Medium or persistent hernias (>1 cm): elective surgery recommended to prevent future strangulation.
Strangulated hernias or hernias containing bowel: emergency surgery, do not wait.

The procedure is straightforward: herniated contents are returned to the abdomen and the defect closed with sutures. The prognosis is excellent when done electively.

Post-operative Care

10–14 days of restricted activity, an Elizabethan collar to prevent licking, and suture removal at 10–14 days. Most dogs recover without complications.

Log in Purzi if your puppy has an umbilical hernia, its size and scheduled follow-up appointments. If the lump changes appearance, you will have all the information ready for the vet.