1. The impact of fleas and lice. This type of parasite is easy to find. They mainly live on the dog's body surface, inner thighs, armpits, under the neck, and deep in the fur. They can move and are visible to the naked eye. You can see them right through your dog's fur, so it's not difficult to tell them apart.

2. Mites are also one of the causes of skin diseases in dogs. This parasite is usually found under the skin, on the dog’s abdomen, and on the inside of the thigh. It will cause small red spots on the dog's skin, redness and hair loss around the lips. When a dog has ear mites, there will be brown discharge from the ears. Sometimes the dog will scratch the pinna due to itchiness. So it is not difficult to identify this type of skin disease.

3. Fungi are one of the causes of dog skin diseases. When a pet dog is infected with fungus, its local skin will be hairless and broken, and the skin will become red in patches, indicating a high infection rate. To accurately know whether your dog has fungal skin disease, you should go to the hospital for a professional examination.

4. Eczema, herpes and other purulent dermatitis are also one of the common skin diseases in dogs. Sick pet dogs usually have blisters and pustules on the skin of the abdomen and medial thighs. Of course, to confirm the cause, you should also take your dog to the hospital for examination and diagnosis.

Finally, skin diseases caused by dog ​​allergies are also relatively common. This kind of skin disease occurs quickly, covers a large area, and the dog's skin becomes red. To diagnose your dog’s allergy, you should take it to the hospital for examination.