The treatment of dog eczema mainly includes the following steps:

1. First, the dog should be taken to the veterinarian for diagnosis to confirm the exact cause of the eczema.

2. Based on the diagnosis results, the causative factors that cause eczema should be removed as much as possible.

3. Treatment of eczema usually requires oral medications and topical ointments. Dexamethasone tablets or prednisone acetate tablets can be taken by mouth to reduce inflammation and allergic reactions. After trimming the affected area, you can apply Fusong or Piyanping ointment to relieve symptoms.

4. During the period of pus cell inflammation, antibiotics such as gentamicin and penicillin can be used for intramuscular injection to prevent infection.

5. During the treatment period, the dog’s skin care should be strengthened and excessive cleaning or use of irritating bath products should be avoided.

Please note that the above are only general treatment suggestions. Every dog's situation is unique, so the best treatment plan should be determined by your veterinarian based on your dog's specific situation.