Depending on the potency of the venom that the scorpion injects, a scorpion sting can have different side effects. The sting of a large scorpion would usually just result in some pain and a bit of swelling. The sting of a medium sized scorpion could result in nausea, dizziness, and other minor side effects. The sting of a small scorpion could result, depending on what the venom consists of, in paralysis, heart failure, heart attack, or even death. A scorpion with the most potent venom is called Leiurus quinquestriatus, commonly called the deathstalker.