The back of the dog’s neck is particularly hot. It may be that the dog has just finished exercising, or the weather is relatively hot, and the dog’s body temperature is already higher. As long as there are no other abnormalities, it will be fine. If the dog is mentally disturbed, If the dog has a good, dry nose, etc., it may be a fever. You need to take the dog to the pet hospital to check the cause, and then carry out targeted treatment to avoid delaying the condition.