例1　女,28岁。13岁时双侧下眼睑出现针头大扁平丘疹,呈正常肤色。皮损数目逐渐增多,累及下颌部、腰部、上肢屈侧,对称分布,触之微硬,达数千个,互不融合,夏季出汗时有痒感。例2　女,69岁,例1之母。例3,女,23岁,例1之妹。例2、例3除双下眼睑无皮损外,余处同例1。2年前曾到某个体 Example 1 Female, 28 years old. At the age of 13 years, large flat papules appeared in both lower eyelids, showing a normal skin tone. The number of skin lesions gradually increased, involving the flexor of the jaw, waist, and upper limbs. Symmetrically distributed, it reached a touch of micro-hardness, reaching several thousand, and did not fuse with each other. It was itchy when sweating in summer. Example 2 Female, 69 years old, mother of case 1. Example 3, female, 23 years old, sister of case 1. In Example 2 and 3, except that the lower eyelid had no skin lesion, the rest was the same as in Example 1.