临床资料患儿,女,8岁。主因日晒后颜面、四肢反复出现红斑、水疱伴发热、肿胀5年,于2009年7月6日入院。2004年5月中下旬起颜面、四肢对称出现数个豌豆大小鲜红色斑,有轻度瘙痒。皮损出现第2 d出现低热及双眼睑轻度浮肿,数日后上述症状及皮损消失。随后半月上述症状反复出现,诊断为荨麻疹,经治疗无明显缓解,至同年7月下旬上述症状自行缓解。2005年4月中旬颜面、四肢又出现鲜红斑,较去年 Clinical data children, female, 8 years old. Mainly due to the sun after the face, repeated limbs erythema, blisters with fever, swelling for 5 years, on July 6, 2009 admission. May 2004 from the late face, limbs appear symmetrical number of pea fresh red spots, mild itching. Lesions occurred on the 2nd day and mild edema of both eyelids, and the symptoms and skin lesions disappeared after a few days. Followed by a half months the above symptoms recur, the diagnosis of urticaria, no significant relief after treatment, to the same year in late July the above symptoms ease themselves. In mid-April 2005 face, limbs appear erythema, compared with last year