Solutions to the redness and hair loss above the dog’s nose:

1. The redness and hair loss above the dog’s nose may be caused by malnutrition. Feed more foods high in protein and vitamins.

2. It may be caused by the dog's hair loss during the change of season. The dog will lose hair during the change of season. It may happen that the hair loss starts from the nose area. This is a normal phenomenon.

3. Redness and hair loss above the dog’s nose may be caused by fungal skin lesions. You can buy fungal treatment drugs and spray them on the affected area.

4. Redness and hair loss above the dog’s nose may be caused by parasites, such as mites, and owners should deworm their dogs regularly.

5. The redness and hair loss above the dog's nose may be caused by trauma, collision and bite. The owner should check carefully to see if there are any obvious marks. If there are any, they can apply some trauma medicine for disinfection and sterilization.