Injury Sore on baby guinea pig's ankle

[fuzzball4444]

I barely adopted this guinea pig from a friend, but now that I look closer this afternoon. It has a very strange wound/sore I have never seen on any guinea pig. I ask my friend about it. She don't know. I plan to take him to the vet. When I touch it, it hurts, it's also swollen pretty bad.

can you please help?

 

[ItsaZoo]

Swollen and painful sounds like an injury that has become infected. If this is on the hock area of the leg that touches the floor when your guinea pig sits in one place, it could be podormatitis. A vet visit is in order.