erythema marginatum

例句：

1. 1. The patient's skin was covered in a patchy erythema marginatum that made it difficult to see the underlying tissue.
   患者的皮肤上覆盖着一块不规则的红斑，使得难以看清下面的组织。
2. 2.The condition is characterized by the presence of erythema marginatum on the skin, which can be painful and uncomfortable.
   该病状的特征是皮肤上有红斑，这可能会带来疼痛和不适。
3. 3. In some cases, erythema marginatum may be caused by an allergic reaction to a particular substance or medication.
   在某些情况下，红斑边缘型可能是对某种特定物质或药物的过敏反应所致。