My hamster’s right leg is a bit swollen – what is it?

A swollen hamster leg can have many causes, including wound infection, skin disease, fracture, or osteitis. The photo alone cannot confirm the cause.

Take the hamster to a vet for diagnosis. Check the skin for abnormalities; if wounded, disinfect and apply anti-swelling ointment.

Make a small cardboard Elizabethan collar to prevent licking.