Bleeding from scalding duckbill is caused by improper operation. According to relevant public information, scalding duckbill is a common feeding method, and its purpose is to prevent ducks from pecking around facilities and companions. But if it is not handled properly, it will lead to oral bleeding in ducks. Generally speaking, when scalding duckbill, it is necessary to heat pliers with tools such as gas lamp or torch. The pliers will pinch the duck's mouth and burn it when it is red. Due to the stimulation of high temperature, the oral tissues of ducks will be scalded, causing pain and bleeding. In addition, if the temperature of pliers is too high or the ironing time is too long, it may cause more serious injuries, such as oral ulcer and infection. When scalding the duckbill, you should choose the right tools and scalding time to ensure that the pliers are at the right temperature to avoid scalding the duckbill. In the later stage, you should protect the duckbill to avoid infection.