血余炭为人发闷煅而成的炭 ,有消瘀止血和补阴利尿作用。因其止血而不留瘀 ,故为临床常用止血中药之一。笔者近来发现一些不法分子为牟取暴利 ,在血余炭中掺杂木炭 ,严重影响了临床治疗效果。现将两者的鉴别特征分述如下。1　正品呈不规则的块状 ,大小不一 ,色乌黑光亮 ,表面有 Blood charcoal is made from human hair and stuffed with calcined charcoal, which has the effects of eliminating blood stasis, stopping bleeding, and supplementing yin and diuresis. Because it stops bleeding without leaving phlegm, it is one of the commonly used hemostatic Chinese medicines. The author recently discovered that some lawless elements have been pursuing huge profits and doping charcoal in blood charcoal has seriously affected the clinical treatment effect. The distinguishing features of the two are as follows. 1 Authentic, irregular block, different sizes, bright black, surface