There are many possible reasons why your dog may be rubbing its nose. Some common reasons include:
Cleaning: Dogs use their noses to clean themselves, just like humans do by wiping their noses with their hands.
Sensory: Dogs’ noses are their primary means of sensing the world, so they may constantly scan their noses to explore the scents around them.
Symptoms: If your dog's nose is always wet, it may be because it has a cold or respiratory disease. In this case, it's best to take him to the vet.
Dryness: If your dog’s nose is very dry, it may be due to a dry environment or because he is taking medication.
In this case, you can apply some care products to moisturize the dog's nose. If your dog's nose is consistently moist or dry and accompanied by other symptoms, it is recommended to take him to the veterinarian.