Causes include local friction, allergies, local skin diseases causing itching, hormonal disorders, etc. Some forms of acanthosis nigricans are idiopathic, while others are hereditary.

【Symptoms】

In the early stage of the disease, dogs have hair loss in small areas on the inner limbs and body surface, and symptoms of lichen can be seen. In the later stage, severe hair loss spreads all over the body, skin abrasions, seborrhea and excessive skin pigmentation occur. The dog's body is emaciated and appears sad. If no treatment measures are taken, the condition will worsen.

【Treatment】

(1) Bathe the sick dog and use seborrheic shampoo to thoroughly clean the dander on the skin.

(2) Implement systemic antibacterial treatment for sick dogs, with prednisolone at 0.5 mg per kilogram of body weight and lincomycin hydrochloride injection at 15 mg per kilogram of body weight for intramuscular injection, twice a day, and vitamin C per kilogram of body weight. 500 mg and 5 mg of vitamin B6 per kilogram of body weight orally for 4 consecutive days. In order to prevent drug resistance, cross-medication was carried out on the fifth day. Dexamethasone injection was injected skinally at 1 mg per kilogram of body weight, and penicillin was injected intramuscularly at 60,000 units per kilogram of body weight, twice a day, and must be consolidated for 3 days.

(3) Scrape off the aging rough skin from the bark of the neck pine tree, add a small amount of salt to the inner bark and mash it, take the juice and apply it on the affected area of ​​the dog, apply it 3 times a day for 3 consecutive days, and the sick dog can recover.