Burns and scalds can be caused by either dry heat from fire, hot objects, or electricity which cause burns, or wet heat from hot liquids, steam which cause scalds. Signs include redness, swelling, blisters and charred skin. If someone has a burn or scald, remove any jewellery, apply a sterile dressing or cling film, treat for shock if needed, and seek medical help if serious. Minor burns should be cooled under cold running water for at least 10 minutes.