If a dog's legs are swollen and afraid to land, it may be an injury. The owner can check whether there are obvious traumatic wounds on the dog's legs. If so, use iodophor for local wipe and disinfection to avoid wound infection. , if no abnormality is found, it is best to send the dog to the pet hospital for x-ray examination to prevent fractures. During this period, pay attention to supplementing the dog with nutrients, which is conducive to the dog's physical recovery.