Reasons for dogs rubbing their noses on the ground:

1. There is a foreign body in the nose. If it is contaminated with pollen, ink, etc., it is recommended that the owner clean the dog's nose in time.

2. Skin diseases. The dog's nose is infected with microorganisms, causing skin diseases and nasal itching. It is recommended that the owner take the dog to the hospital for examination in time, and treatment can be carried out after the pathogen is determined.

3. Smell. There is a special smell on the floor and the dog is just sniffing the smell.

4. Habits. If a dog gets something he likes very much, he may want to "hide" it for later use, and he will dig his nose into the ground. This is a habit.

5. Cold. If a dog is accidentally infected with influenza, the secretions in its nasal cavity will increase and even block the nasal cavity, causing the dog to have difficulty breathing. Therefore, the dog will want to rub its nose back and forth to shake out the secretions in the nasal cavity and restore itself to normal breathing.