I noticed a small lump on my guinea pig this week, thankfully I work at a vets and was able to take her in for a check up which the vet then noticed a grape size lump which is more internal than the small one. I’m pretty sure the small one was 9mm and the bigger one was 22mm so around 2 cm. the small one is very mobile and easily moved so I’m not that worried about that, it’s the bigger one, I can grab it and move it the smallest amount. The vet said poss lipoma because over weight but to bring back in for checkup on the size in two weeks, she’s eating fine, etc. But I’m really terrified she’s only just turned one! Please give me some reassurance/advice. I really will appreciate every response. Thank you so much. ( her names bubbles ).