What Is This On His Back?

[Tatlipika]

Hello, I've noticed two dry bumps when I was petting Pika. It looks like a slit, width is about 4-5mm. Here's a picture. There is no reason for a cut. No blood traces. I'd appreciate any clues. There are not any Guinea pig specialized vets around me. Thanks very much.

 

[Swissgreys]

It could be a skin condition like mites, a cut from another piggy or something in his cage, or a cyst.
Does he live alone?
How long have you had him?
Does he seem healthy otherwise (bright eyes, shiny coat, good appetite, active, etc)?
Is there a lump surrounding the cut?

If there is no lump and it looks and smells 'clean', and he seems fine within himself it might just be an old injury, but I would keep a very close eye on it.

 

[Tatlipika]

Hi swissgreys thanks so much. Pika is 7 months old and lives alone, no other pets contacting. I've had him since February. He looks well, acts normal, shiny fur, bright eyes. The cuts don't look swollen and they are clean and dry. No sign of fleas mites that I could see. Pika didn't give any response when touched there. The cuts are high on his back so I don't think he cut it himself. Only thing that contacts there is the metal mouthpiece of his water bottle.It is st.steel and doesnt feel sharp. Doesn't look likely. Maybe a parasite or a bug bite. I'll keep close eye. I wonder if I should apply some form of wound treatment.