If your dog has leprosy, you can use fungal treatment drugs and external anthelmintic drugs. If the condition is serious and the infection area is large, you can directly give the dog a medicated bath. If you persist for a period of time, it will get better. You must pay attention to your dog's hygiene, bathe and deworm your dog regularly, do not take your dog to places with a lot of mosquitoes, and clean and disinfect the environment regularly.