lichen haemorrhagicus

例句：

1. 1.The patient's condition was so severe that he needed immediate treatment.
   患者的病情非常严重，需要立即治疗。
2. 2. This disease is caused by a fungus that feeds on lichens and causes them to bleed.
   这种病是由一种真菌引起的，这种真菌以青苔为食，导致它们出血。
3. 3. The doctors were puzzled by the strange symptoms of the patient, who had been suffering from lichen haemorrhagicus for months.
   医生们对病人奇怪的症状感到困惑，病人已经患有青苔出血病几个月了。