5 min read
Why Is My Guinea Pig Scratching? Mites vs Fungal Infection
Frequent scratching in guinea pigs is often caused by mites or ringworm. Learn the differences, the signs and why a vet diagnosis matters.
Some scratching is normal
Guinea pigs groom and scratch briefly throughout the day. Constant scratching, biting at the skin, hair loss or crusting are not normal and point to a skin problem.
Mange mites
- Intense itching, sometimes so severe a pig rolls or squeals.
- Hair loss and thickened, scabby skin, often on the back and shoulders.
- Can cause seizure-like episodes from itching in severe cases.
Ringworm (fungal infection)
- Round, scaly, hairless patches, often on the face, nose and ears.
- Usually less itchy than mites.
- Can spread to people, so wash hands after handling.
Why you need a diagnosis
Mites and fungus need different treatments, and some over-the-counter products are toxic to guinea pigs. An exotic vet can confirm the cause, usually with a skin scrape or hair sample, and treat all pigs in the group.
When to call an exotic vet
This guide is general education, not veterinary advice. If your guinea pig stops eating, stops producing droppings, struggles to breathe, bleeds, or seems suddenly quiet, contact an exotic vet the same day. Guinea pigs hide illness, so small changes matter.