《黄帝内经·灵枢·痈疽》
这种病的外部没有明显的变化，然而痈肿所化的脓紧贴骨上，如果不及时治疗，约三十日后死亡。
其状不甚变，而痈脓搏骨，不急治，三十日死矣。
There is no obvious change in the appearance of the disease, however, the pus transformed from the carbuncle is tightly attached to the bone. If it is not treated in time, it will die after about thirty days.