Treat wounds with mercurochrome or mercurochrome. If you have a heart attack, patting your elbow can give first aid. People fainted, immediately pinch people have miraculous effect; … … These widely circulated first aid methods may be familiar to everyone. However, these methods are not only useless, but also may harm the body. Today, Ding Dang invited Mr. Zhang Yuanchun to talk to you about the misunderstanding of first aid. Myth 1: Treat Wounds with Mercurochrome and Mercurochrome Mercurochrome, also known as mercurochrome, contains mercury ions. Too much use may cause mercury poisoning and is not very safe. As for amethyst, studies have found that it has certain potential carcinogenicity and is hardly used now. At present, the hospital is Read More …