The self-healing ability of dogs is slightly stronger than that of humans. Generally, minor illnesses can be cured on their own, but serious illnesses also require the help of their owners to treat them. If a dog is sick, you cannot just assume that the dog will heal on its own. It is best to Take the dog to the hospital for examination to confirm the severity of the condition. Generally, relatively small wounds can heal on their own after cleaning. Skin diseases, infectious diseases, gastrointestinal diseases, etc. cannot heal on their own and require prompt treatment.