Lumps and Bumps in Guinea Pigs
Hi everyone, I’m Dr Sam, a piggy passionate veterinarian, and today I’d like to chat about something I see quite regularly in clinic, lumps and bumps in guinea pigs. It can be worrying to discover a lump on your pet, and while not every lump is dangerous, it’s always important to have it checked early.
What Could a Lump Mean on your Guinea Pig?
Lumps in guinea pigs, just like humans and other animals, can have many causes. Some are harmless, like sebaceous cysts, while others, such as abscesses or tumours may require treatment. It’s not always easy to tell what a lump is just by looking or feeling it, which is why a vet check-up is essential. The only way to tell what type of lump is present is to extract cellular material from the lump and assess it microscopically. In some instances, your vet may recommend sending a sample away to be interpretated by a pathologist at a nearby laboratory to confirm the diagnosis.
Types of Lumps in guinea pigs
There are many different types of lumps that guinea pigs can develop, hence the importance of getting an accurate diagnosis by your veterinarian if you notice any changes in your guinea pigs skin.
Abscesses - Can become quite large lumps, generally appear quite quickly and can be hot and painful. They are usually the result from an infection such as a small wound that has become infected, or something such as dental disease and infection of the tooth roots. Abscesses do require veterinary intervention, especially to assess and treat the underlying cause.
Tumours - There are many different types of tumours and growths guinea pigs can develop - they can vary in consistency and may or may not be cancerous. Lipoma's for example are a type of benign tumour made from fatty deposits under the skin - Lipoma's don't cause immediate danger to your piggies however they can grow quite large and impede their normal mobility and function. Some tumours however can be quite nasty and spread to different parts of the body including other organs.
Sebaceous Cysts - Are a benign lump arising from hair follicles that have become clogged with dead skin cells and sebum (an oily secretion). These usually don't cause harm to your guinea pigs, however may become large, infected or ulcerated. In some cases we recommend conservative treatment whilst others may require surgical removal.
What to Do If You Find a Lump
If you notice anything unusual, book a visit to your local cavy savvy vet. We'll usually perform a physical exam and might recommend a fine needle aspirate, biopsy, or drainage, depending on what we suspect the lump to be.
Keep in mind that early detection leads to better outcomes. We highly recommend performing regular health checks on your piggies to check for any early changes - check out our YOUTUBE VIDEO HERE ON HOW TO PERFORM A HEALTH CHECK AT HOME.
Guinea pigs that are part of the family, living indoors, getting regular health checks and getting plenty of interaction from the family, tend to have their health concerns picked up and addressed more quickly, often resulting in better outcomes.
Prevention Tips
While not all lumps can be prevented, maintaining your guinea pig’s health goes a long way. Make sure their living environment is clean and safe. Avoid sharp or rough accessories in their cage, especially if you’re using a DIY guinea pig cage solution. This can prevent injuries and infection under the skin.
Diet also plays a role, especially when it comes to preventing dental disease and tooth root abscessation. Knowing what guinea pigs eat is key to supporting a strong immune system and high levels of Vitamin C. Ensure your guinea pigs always have access to a good quality hay such as timothy, meadow, pasture or oaten hay, as well as supplementation with a good quality pellet such as Burgess Excel and fresh vegetables daily.
When to Be Concerned
We recommend all new lumps and bumps be assessed by a veterinarian, as it is impossible to tell if a lump is malignant or benign just from appearance and touch, without assessing it's cellular make-up.
If a lump grows rapidly, is firm and fixed, or causes your guinea pig discomfort, don’t delay seeking veterinary care. Lumps near the jaw or on the feet can become problematic quickly and may impact eating or movement.
Final Thoughts from Dr Sam
While a lump isn’t always a cause for panic, it should never be ignored. Some lumps can be managed conservatively, be non-painful and not cause any further issues, whilst others can be malignant, painful, and potentially life threatening. Often the only way to cure tumours is surgical removal. Some lumps that were previously benign and not causing any issues can change over time and become larger, ulcerated or infected, which may be reason for a re-check. I recommend getting any new or changing lumps checked by your cavy savvy vet to ensure your piggy is getting the best treatment.