The discoloration of the dog's nose may be caused by the aging of the dog and the reduction of melanin deposition, or it may be caused by disease. What affects the melanin deposition in dogs’ noses is the amino acid oxidase enzyme. This enzyme is very sensitive to temperature and has a stronger effect in warm environments. Dogs’ noses tend to fade in winter and return to black in summer.

The discoloration of the nose may be due to vitiligo

Leukoplakia can also cause the nose to discolor. Vitiligo is an immune system disease in dogs. The skin of dogs with this disease will There are patches of white spots. Paying more attention to your diet can alleviate some of the symptoms of this disease.

Nose fading may be due to snow nose

The phenomenon of dog nose fading in winter is called snow nose, which is a seasonal reduction of nasal pigment. The temperature is low in winter, and the nose plane is the lowest part of the body body temperature. This In this case, usually not all the nasal plane becomes white, and not all around the lips turn white. As long as the dog is in good mental condition and there are no other phenomena, it does not fall into the category of disease.

Nose discoloration or contact allergy

Some dogs often come into contact with plastic rice bowls and are sensitive to plastic products, which can cause contact skin inflammation, nose discoloration, and even Lips are swollen. The solution is just to replace the plastic rice bowl with stainless steel.

Nose discoloration or heterochromatic nose

The cause of heterochromatic nose may be hereditary, autoimmune or unknown. In terms of genetics, it is caused by a dominant ring chromosome defect. These dogs are normal at birth and begin to change when they are 6-12 months old. The black part of the dog's nose gradually fades into chocolate brown or It is whitish in color and there is no effective treatment. Some dogs will spontaneously improve or their pigment will return, but only a very small number of dogs will.

The nose may fade due to reduced skin pigment

The symptoms of reduced mucous membrane and skin pigment are similar to those of snow nose, and must be distinguished carefully. The reduction of skin pigmentation will cause the pigmentation of the nasal plane, lips, eyelids, tongue and oral cavity to decrease. If it completely turns into white spots, it will be very easy to cause nasal dermatitis in dogs.

The nose is discolored or due to external damage

If the dog’s nose has been scratched or scratched, or has experienced other diseases or psychological trauma, the new growth will be pink, and then Color will gradually return as the injury heals.