TL;DR: A soft lump on a cat's belly is typically a non-emergent umbilical hernia, but you should seek immediate veterinary care if the area becomes hard, painful, or discolored.
What could be causing a soft, squishy lump on my cat's belly?
A small, soft, squishy lump located where the belly button would be is most commonly an umbilical hernia. This happens when the abdominal muscles fail to close completely after birth, allowing a small amount of abdominal fat or tissue to protrude through the opening. It is a common condition in kittens but can persist into adulthood if not repaired.
How do I know if my cat's belly lump is a medical emergency?
Urgency Level: Low. Most umbilical hernias are non-emergent and painless. Monitor your cat for the following conditions:
- The lump remains soft and can be gently pushed back in (reducible).
- Your cat continues to eat and act normally.
- Seek immediate care if the lump becomes hard, hot, painful, or discolored.
- Seek immediate care if your cat starts vomiting, as this could indicate a trapped (strangulated) loop of intestine.
How does sending a photo help my veterinarian triage the lump?
Sharing a clear, well-lit photo of the lump with your veterinary team is incredibly helpful for several reasons:
- It allows the professional to assess the size, location, and skin condition of the area.
- A photo acts as a baseline to monitor if the hernia is growing or changing over time.
- It helps the vet decide if the repair should happen soon or can wait until a routine procedure like a spay or neuter.
Clinical Context (Merck Veterinary Manual)
Umbilical hernias in cats present as a soft lump at the belly button and vary in size, potentially containing fat or omentum, or in more severe cases, intestinal loops. Diagnosis is typically achieved through observation and palpation of the hernia sac. Concurrent congenital defects such as cryptorchidism may be present. Surgical closure of the body wall defect is indicated in most cases to reduce the risk of future intestinal incarceration.
Chapter: Surgery, Gastroenterology, Congenital Disease
Source: The Merck Veterinary Manual, 11th Edition (Page 167)