Scratching is normal behavior for guinea pigs and they will often scratch themselves to keep their fur clean and free of parasites. However, if your guinea pig is scratching excessively or scratching areas that are not normally scratched, then it may be indicative of a problem and you should consult your veterinarian. Excessive scratching can be a sign of an infection, skin irritation, or another health issue.
If left untreated, these issues can become more serious and require medical attention. So if your guinea pig is scratching more than usual, be sure to have them checked out by a vet.
Scratching is also a way for guinea pigs to show their affection. When they scratch each other, it is like a hug and it helps to strengthen the bond between them.
Benefits of Scratching For Mammal Animals

Encouraging healthy scratching behavior, which can help to keep your guinea pig’s fur clean and free of parasites.
Helping your guinea pigs develop a relationship that makes them more social.
Helping to keep their nails trimmed. Scratching helps to wear down the sharp edges on their nails over time, but if they are scratching excessively then you should trim their nails more frequently.
Guinea pigs scratching another guinea pig is normal, healthy behavior within the species! It shows their affection for one another and it also helps to strengthen the bond between them! If you have concerns about excessive scratching or scratching in areas where they usually don’t scratch, speak with your veterinarian about treatment options!
Should I stop my guinea pig scratching?

No! If your guinea pig is scratching excessively or scratching areas that are not normally scratched, then it may be indicative of a problem and you should consult your veterinarian. Excessive scratching can be a sign of an infection, skin irritation, or another health issue. If left untreated, these issues can become more serious and require medical attention. So if your guinea pig is scratching more than usual, be sure to have them checked out by a vet.
Scratching is also a way for guinea pigs to show their affection. When they scratch each other, it is like a hug and it helps to strengthen the bond between them.
Guinea pigs scratching another guinea pig is normal, healthy behavior within the species! It shows their affection for one another and it also helps to strengthen the bond between them! If you have concerns about excessive scratching or scratching in areas where they usually don’t scratch, speak with your veterinarian about treatment options!