The owner needs to take the pet to the pet hospital immediately for disinfection and anti-inflammatory treatment. In serious cases, a doctor may need to help with suturing. If the situation is serious, it is recommended to wrap it with gauze and tie it to the back to immobilize it. Until the affected area heals, wear an Elizabethan collar on the dog to prevent licking.

What causes ulcers on the dog's testicles:

1. For ulcers caused by fungal infections, we must first use antifungal drugs.

2. It may also be ulcers caused by autoimmune disorders, which are commonly known as allergies. In this case, we will choose to use hormones or cyclosporine for treatment.

3. Bacterial infection causes skin ulceration on the dog's testicles. At this time, we need to choose antibiotics for sterilization treatment. The type of antibiotics is best determined based on the results of the drug sensitivity test.

4. The dog accidentally caused trauma during activities, and did not deal with it in time or wear a collar, resulting in skin ulceration.