男，４３天。母亲带养，因天气阴雨秋凉穿两件毛线衣，袖口完全遮盖双手指尖。两天睡觉均未脱衣，发现左手２，３，４指肿胀就诊。检查左手中指明显肿胀如鼓锤状，皮肤充血红亮，近掌指关节处被头发缠绕两周，其中一圈头发入皮下层，深０．１～０．２ｃｍ，损伤皮肤有血性... Male, 43 days. Mother with the support, because of the weather autumn and cool to wear two sweaters, cuffs completely cover your fingertips. Two days to sleep without undressing, found that the left hand 2,3,4 refers to swelling treatment. Check the left middle finger was significantly swollen, such as drum-shaped, red and red skin, near the metacarpophalangeal joint was wound two weeks, one of the hair into the skin, deep 0.1 ~ 0.2cm, damage the skin bloody ...