The induration that occurs when a dog is bitten by a tick is because the tick leaves toxins in the dog's skin after biting the dog, so the dog's skin becomes pimpled. At this time, you need to observe whether there are still ticks on the dog and whether the bitten area is large. If there are still ticks or the bitten area is relatively large, it is best to take the dog to the pet hospital for treatment; if there are no ticks, , there is only one pimple, you can clean and disinfect it first, and then apply antiseptic and anti-inflammatory drugs.