How come calamine lotion, which costs only a few dollars a bottle, has become the “all-round anti-itching drug”?

Speaking of calamine lotion, many people may be familiar with it. As a common medicine in the family medicine cabinet, whether it is mosquito bites, eczema, prickly heat, or urticaria, dermatitis, as long as you apply it, you will feel very comfortable. So what is calamine lotion made of? Where does its excellent anti-itching effect come from? And how to use it correctly? This issue of the comic strip will take you to learn more about it~