When dogs are infected with ringworm, they will have symptoms of hair loss. It is recommended to spray or take a medicated bath. In serious cases, you need to go to the hospital for treatment. New hair will grow after the ringworm is cured. Ringworm in dogs is a skin disease that is highly contagious and easy to relapse. The treatment cycle is relatively long and requires patient treatment before it can be cured. You should also take precautions at ordinary times, deworm your dog regularly, keep your dog clean and sanitary, and disinfect frequently.