When to seek emergency care

Call 911 or seek immediate care for a chemical burn in which the burn:

• Is deep
• Covers an area larger than 3 inches (about 8 centimeters) in diameter
• Covers the hands, feet, face, groin, buttocks or a major joint

If you're unsure whether a substance is toxic, call Poison Help at 800-222-1222 in the United States. If you seek emergency medical help, take the chemical container or the name of the chemical with you to the emergency department.