yī / shēng / tí / xǐng / tā / yào / zhù / yì / qīng / jié / yǐ / miǎn / bāo / pí / gòu / jī / lěi / yǐn / qǐ / yán / zhèng

医生提醒他要注意清洁，以免包皮垢积累引起炎症。

The doctor reminded him to maintain good hygiene to prevent smegma buildup from causing inflammation.