某厂的砂轮磨光工李师傅已经有25年的工龄了。近两年来,平时一向很健康的李师傅总感到头痛、头晕,经常丢了这个、忘了那个,夜间还迟迟不能入睡。尤其叫李师傅心烦的是右手时常发麻、发白,并且疼痛,每年冬季时加重,天气越冷犯得越厉害, A factory wheel grinder master Lee has 25 years of service. In the past two years, Master Lee, who has always been very healthy, always feels a headache, dizziness, often missing this, forgetting that, and still can not sleep at night. In particular, called Master Li upset his right hand is often numb, white, and pain, increased each winter, the coldest the more violent the weather,