When a tick bites your dog, the tick stays in place and feasts away. This can make removal simple, because the tick isn't crawling around. On the other hand, his head is buried beneath the surface of the skin. Sometimes, tick removal can decapitate a tick, removing the body but leaving the head buried in the skin. If this happens to your dog, you may need to pay the veterinarian a visit.
Once a tick has been decapitated, he's dead. The head that has been left behind in your dog's skin won't inject more toxins into your pet. There may be some redness and swelling, which you can treat by washing the site with gentle soap and warm water. Report what happened and your dog's condition to the veterinarian, who will instruct you to monitor the bite site for worsening rash. This can indicate an infection caused by the festering tick head. You may need to take your dog to the veterinarian to have the head removed and the site treated -- your vet will decide.
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