TL;DR: Small lumps on a cat's abdomen are often normal nipples or benign growths like lipomas, but they should be monitored for changes in size or color. While usually not an emergency, you should schedule a veterinary exam to confirm the cause and rule out more serious issues.
What are these small lumps I found on my cat's belly?
Finding multiple small lumps under the skin of a cat's abdomen is a common reason for veterinary consultations. Common causes for these findings include:
- Normal mammary glands or nipples (present in both males and females)
- Lipomas (benign fatty tumors)
- Skin tags or small cysts
- Mammary hyperplasia or mammary tumors (more common in older, intact females)
Is it an emergency if my cat has multiple small lumps on their abdomen?
The urgency level for this concern is typically low. You should follow these guidelines for care:
- Monitor the area for a few days if the lumps are small, firm, or soft and not causing distress.
- Schedule a routine veterinary appointment for a professional evaluation.
- Seek urgent care if the lumps grow rapidly, become red or ulcerated, or if your cat becomes lethargic and loses their appetite.
How does a photo of the lumps help with the veterinary triage process?
Providing a clear, high-resolution photo is an excellent first step because a visual aid allows a veterinary professional to:
- Assess the distribution of the lumps; for example, perfectly symmetrical lumps are likely normal nipples.
- Evaluate the color and texture of the skin.
- Distinguish between surface-level skin irritation and deeper subcutaneous growth before the clinic visit.
Clinical Context (Merck Veterinary Manual)
In cats, small lumps under the belly may be due to mast cell tumors or lipomas. Cutaneous mast cell tumors are most common in cats older than 4 years, but the histiocytic type is seen primarily in Siamese cats younger than 4 years. Mast cell tumors typically appear as single, hairless nodules, often 2-3 cm in diameter, or as multiple, small, firm, subcutaneous papulonodules. Lipomas are more common in older, neutered male Siamese cats and appear as soft, occasionally pedunculated, discrete nodular masses.
Chapter: Oncology, Dermatology
Source: The Merck Veterinary Manual, 11th Edition (Page 965)