The discoloration of the dog’s nose may be due to the season
Because the melanin deposition is affected by the “amino acid oxidase”, the amino acid oxidase is very sensitive to temperature, and its effect is stronger in high-temperature environments, so noses appear in summer. Dark in color, lighter in winter. If your nose is discolored due to seasonal reasons, don’t worry, the color will return in another season.

Dogs’ noses may fade due to aging

Just like humans’ hair turns gray as they age, after dogs age, the effect of amino acid oxidase becomes smaller, melanin precipitation will decrease, and melanin will decrease. Later, the color of the dog's nose will become lighter and will not be as dark as when it was a puppy.

The dog’s nose may fade due to skin disease

If the dog’s nose is scratched or scratched, the color of the tip of the nose will become lighter, and the color of the tip of the nose will return after recovery. Skin allergies, skin fungal infections, etc., if they cause damage to the basal layer of the skin, may also affect the normal metabolism of melanin, causing the tip of the nose to fade.

The discoloration of the dog’s nose may be due to the immune system

Autoimmune diseases refer to diseases caused by the body’s immune response to its own antigens, resulting in damage to its own tissues. That is, the body recognizes the melanocytes produced by itself as "foreign matter" and produces corresponding antibodies to destroy them. Currently, the most studied autoimmune diseases that can cause discoloration of dogs’ noses include vitiligo, lupus erythematosus, and pemphigus vulgaris.

The fading of the dog’s nose may be due to trace elements

Trace elements play an important role in the formation of melanin, especially copper ions and zinc ions, which have a greater impact. If your dog’s daily nutritional intake of trace elements is insufficient, it may cause the dog’s nose to discolor. B vitamins can promote metabolism in animals and are indispensable substances for converting heat energy. If lacking, cell function will decline, causing metabolic disorders.