Some active ingredients in cicada slough can be slowly dissolved in water. Generally speaking, the higher the water temperature, the faster the dissolution rate. But if you soak in water, the water temperature can't last for a long time, and boiling water can make water boil for a long time, so the effect of boiling water will be better.

Before boiling water with cicada slough, you can also soak cicada slough in cold water for about half an hour, and then cook it with the soaked water, which can also promote the precipitation of effective components in cicada slough.