患者，女，16岁。主因四肢出血点反复发作半年余．自觉病痒，近10d加重而入院。患者于半年前因患扁桃体炎出现双下肢出血点，经中西药物治疗后，皮疹基本消退，但不久又复发，而改为单纯中药口服治疗。既往无药物过敏史。曾在我院变态反应科查过敏原未发现阳性。查体：一般情况 Patient, female, 16 years old. Mainly due to extremities bleeding repeatedly attack more than six months. Conscious itching, aggravated in the past 10 days and admitted to hospital. The patient suffered bleeding from the lower extremities due to tonsillitis six months ago. After the treatment with Chinese and Western medicines, the rash basically subsided, but soon recurred, and was changed to oral Chinese medicine alone. No history of drug allergies. Allergens in our allergy department had not been found to be positive. Physical examination: General situation