The dog licked its master's wound.
Dog saliva can kill bacteria and viruses to some extent, and can relieve pain. When a dog is injured, it will lick its wound and treat it. If a dog licks its owner's wound, it means that it intends to help the owner alleviate the pain and heal the wound, which is a sign of loving the owner.
Although the dog is kind, the keeper should refuse to let it lick the wound. Dog saliva does not rule out the possibility of rabies virus. If you let it lick the wound, it is likely to bring the virus into the blood, with serious consequences.
If the wound has already seen blood, it is still recommended to get a shot of rabies vaccine at the vaccine station after being licked by the dog, just to be on the safe side. If there is no blood in the wound, the dog's saliva will not enter the blood, and the harm will be less, but it is recommended that the breeder clean up the saliva.