Dog hair loss and skin ulcers can be caused by a variety of reasons, including infection, allergies, skin diseases, etc. These infections are often accompanied by symptoms such as redness, swelling, itching, and pain. Therefore, a detailed diagnosis of the dog is required to determine the cause. This may include skin exams, blood tests, allergy testing, and more.

It is recommended to take your dog to the pet hospital for regular health checkups to detect and treat potential health problems in a timely manner. Provide your dog with a balanced, nutritious diet to enhance his immunity and reduce the risk of infection. Keep your dog’s living environment clean and hygienic to avoid allergens and sources of infection. Groom, bathe, and deworm your dog regularly to reduce the risk of skin diseases and parasitic infections.