This is a medical emergency; take your pit bull to the vet as soon as possible. He needs urgent medical care. There is a chance that the insect that bit your pet is not venomous. The reason for that is that there the digestive enzymes present in the scorpion's sting cause a lot of pain and it depends on the scorpion's type if it has poison in its sting or not. Even if he has not been bitten by a poisonous insect, then you need to take him out to the vet too because it might not be possible to judge the nature of the bite yourself.
