He noticed some smegma under his foreskin.

他注意到他的包皮下有一些包皮垢。

Smegma can cause infections and discomfort.

包皮垢可能会导致感染和不适。

The doctor advised daily cleaning to prevent smegma buildup.

医生建议每天清洗以防止包皮垢积聚。

Proper hygiene can effectively prevent the formation of smegma.

适当的卫生可以有效地防止包皮垢形成。

Learning how to clean properly can help reduce the accumulation of smegma.

了解如何清洁可以帮助减少包皮垢的积累。