Black patches on dogs’ skin may be caused by fungal infection. In addition to black patches, dogs are generally accompanied by skin itching, redness, swelling, dandruff and other symptoms. They need to go to the pet hospital for examination and treatment in time. . Secondly, it may be that there is too much melanin deposited in the dog's body, resulting in black patches. This is a normal phenomenon and the owner does not need to take too many measures. In addition, dark spots may also appear when dogs suffer from endocrine diseases such as hypothyroidism.

1. Fungal infection

If a dog's skin is infected with fungus, black patches may appear, accompanied by symptoms such as skin itching, redness, and dandruff. At this time, the owner needs to take the dog to the pet hospital immediately for diagnosis and develop an appropriate antifungal treatment plan based on the type of fungus.

2. Pigmentation

If the dog is older, it may also be age spots, because as the dog ages, varying degrees of pigmentation will appear on the skin of the dog. , resulting in dark spots. In addition, if the dog often basks in the sun or is exposed to some ultraviolet radiation, it may also cause local dark spots. This is a normal situation, the owner does not need to worry too much, just take a bath naturally.

3. Suffering from endocrine diseases

When dogs suffer from endocrine diseases, dark spots may also appear, such as hypothyroidism, which causes skin pigmentation. Symptoms such as depression, lethargy, inactivity, massive hair loss all over the body, sensitivity to cold, and weight gain are also common. If your dog is found to have the above symptoms, it is recommended to check the dog's thyroid hormone level. If the thyroid hormone level is insufficient, it is recommended to supplement the dog's thyroid hormone.