Chemical burns occur when skin or eyes come into contact with harmful substances, such as acids or alkalis. These burns can cause pain, redness, and damage to the affected area. Common sources of chemical burns include household cleaners, industrial chemicals, and certain plants. It's important to recognize the symptoms early to prevent further injury. To treat a chemical burn, immediately rinse the affected area with plenty of water for at least 20 minutes. If the burn is severe or involves the eyes, seek medical attention right away. Always handle chemicals, like bleach or ammonia, with care to avoid accidents.