24. You Spill Solvent, Acid, or Bleach on Your Skin
"Dilution is the solution to pollution," says Dr. Mell, in a catchy little singsong. "For any chemical exposure, rinse the area under cool water for 15 minutes," he says. In most cases, that's all you need to do, but head to the hospital if you see a visible burn mark or if the exposed area includes your face, palms, feet, or groin. The size of the exposure may also force you to the hospital: If the area is larger than your two hands—2 or 3 percent of your body—you need medical attention.