If a tick grows on the dog's head, it needs to be treated promptly. You can use alcohol or a spray designed to treat ticks and spray it on the dog's head. Then wait for the tick to die and then clean it with soapy water. You should pay attention to the cleanliness of your dog, perform regular external deworming, and do not take your dog to flowers and grass. Once you find parasites or skin diseases on your dog, treat them immediately and isolate them from other dogs.