包茎是指包皮口狭小,不能完全外翻显露阴茎头的一种情况~([1-2])。包茎有原发性和继发性两种,其中原发性包茎是男孩最常见的生殖器发育异常~([1-3])。狭小的包皮口可导致尿线变细和包皮腔鼓起,严重者可引起排尿困难、阴茎头包皮炎甚至尿路感染~([2])。随着年龄增长,原发性包茎有自愈倾向:新生儿时,只有4%的包皮可以完全回缩;3岁时,89%的男孩可以暴露阴茎头;16~18岁时,包茎的 Phimosis refers to the foreskin is narrow, can not completely reveal the glans penis a situation ~ ([1-2]). Phimosis has two primary and secondary, of which the primary phimosis is the most common male genital abnormalities ~ ([1-3]). Narrow foreskin can lead to narrowing of the urinary tract and the bulging of the foreskin, severe cases can cause dysuria, penis and head foreskin dermatitis or urinary tract infection ~ ([2]). With age, primary phimosis tend to self-healing: only 4% of the foreskin can completely retracted in neonates; 89% of boys exposed glans at 3 years old; phimosis at 16-18 years old