Symptom · Dogs and cats
Lumps and bumps: what it means and when to call the vet
Most lumps are harmless, but you can’t tell by feel. Any new lump, or one that is growing or changing, should be checked by a vet with a simple needle sample.
By Maya HartCommon causes
- Fatty lumps (lipomas) in older dogs
- Cysts and warts
- Abscesses after fights, especially in cats
- Skin tumours such as mast cell tumours
- Injection-site reactions
What you can do at home
- Measure the lump and take a photo with a coin for scale
- Note where it is on a body map
What the vet may do
- A fine-needle aspirate — a quick needle sample
- A biopsy if needed
- Surgery to remove lumps that need it
Prevention
- Run your hands over your pet each month
- Keep a record of every lump
The details
Veterinary cancer specialists promote a simple rule of thumb — “see something, do something”: if a lump is the size of a pea or larger and has been there for a month, have it sampled. A needle sample is quick, usually needs no sedation, and often gives an answer the same day.
Questions owners ask
Is lumps and bumps an emergency?
Usually it is not an emergency, but your pet should see a vet within 24 hours. Go now if you see: a lump that is bleeding heavily; a hot, painful swelling with fever (possible abscess); a lump with weakness or pale gums.
What causes lumps and bumps?
Fatty lumps (lipomas) in older dogs; Cysts and warts; Abscesses after fights, especially in cats; Skin tumours such as mast cell tumours; Injection-site reactions.
What can I do at home?
Measure the lump and take a photo with a coin for scale. Note where it is on a body map.
Sources
Tailwise is for general information and is reviewed by veterinary professionals, but it is not a substitute for advice from your own vet, who knows your pet. How we check facts