Lump Might be a tumor, but it seems odd, anyone else see this before?

[Chimi]

I haven't noticed any behavioral changes, but found this lump accompanied by what seems like a "pimple" on the skin of my 4 year old guinea female. I don't want to panic too much and need to get to the vet, but has anyone seen this before? I can't seem to find any matches online.

 

[Soecara]

Where on your guinea pig is this bump located?

 

[bpatters]

It looks to me like a small benign cyst -- maybe a seborrheic keratosis or, less likely, a trichofolliculoma. Is it completely on the skin, or is there a lump underneath?

 

[Chimi]

Where on your guinea pig is this bump located?

It's in her left side, on her back.

 

[Chimi]

It sort of feels like a semi hard lump underneath the "sore".

 

[bpatters]

Then I'd take in for a vet visit. Be sure to see an exotic vet -- small animal vets treat dogs and cats, not pocket pets, and some of them are downright dangerous.