Dogs upper lip suddenly pink a piece of dog lips a piece of pink

The dog’s upper lip suddenly pink a piece of 1, the dog’s upper lip suddenly pink a piece of, may be the dog in the process of movement accidentally damage to the mouth, resulting in skin damage. 2, the dog’s lips should be black, if there is a simple discoloration, no obvious hair loss around the mouth, red lesions, may be due to changes in body pigmentation. 3, if there is hair loss or redness, then it The dog’s skin will be discolored and lose hair as a direct result of skin disease. 4. It is recommended that the dog be taken to a veterinary hospital for appropriate examination, such as blood tests, inflammatory response protein, skin examination, to confirm the presence of inflammatory infections and trauma to the skin surface.