A scorpion's sting may cause a variety of health issues.
Although it doesn't occur often, a person having a serious reaction may experience numbness, difficulty swallowing, blurred vision, seizures, difficulty breathing and even death. Today we use the scorpion's own venom to create vaccines against their stings. Scientists have also found that their venom may play a hand in fighting brain cancer. Molecules in scorpion venom attach to a certain protein in tumorous cells which then allows radiation and chemotherapy to follow the venom, gain access, and destroy these cells. While not a true insect, scorpions are arthropods, which are related.
Source: Desert USA