临床资料患儿女,2个月。因头面部红斑1个月余就诊。其父母代诉出生半月后无明显诱因面颊、前额、太阳穴等处出现黄豆大小红斑,红斑逐渐增多增大,约指盖至硬币大,变大的红斑中间颜色变暗,使之成为环状(图1)。发病以来,患者无发热、黄疸、腹泻、惊厥,吮奶及睡眠正常。足月顺产,第 Clinical data Children, 2 months. Due to head and face erythema more than 1 month treatment. Half a month after the birth of their parents there is no obvious incentive cheeks, forehead, temples, etc. appear the size of the red bean erythema, erythema increase gradually increased, about finger to cover the coin, the greater the larger the erythema color becomes dark, making it ring figure 1). Since onset, the patient had no fever, jaundice, diarrhea, convulsions, sucking milk and normal sleep. Full-term natural delivery, the first