患者男,47岁,电工。近4个月内双手掌先后五次出现紫黑色淤点。第一次在抬垃圾箱(约40公斤)后,发现握垃圾箱把手的手掌出现百余个无痛性紫红色淤点,3～4天后变为紫黑色,约半月消退;第二次在双手端热汤碗后7～8分钟出现;第三次发生在握镐刨地后,双手掌出现数百个紫红色淤 Male patient, 47 years old, electrician. In the past 4 months, there have been five pairs of palms purple dark spots. After lifting the bin for about 40 kilograms for the first time, we found that there are over a hundred painless fuchsia spots in the palm of the handle of the bin. After 3 to 4 days, it turns purple-black and recedes about half a month. Hands after the hot soup bowl 7 to 8 minutes after the emergence of the third took place in the grip pick planing, the hands appear hundreds of purple red silt