Questions & Answers about После душа мне нужно постирать полотенце.
Because после requires the genitive case.
The noun душ is masculine, and its genitive singular form is душа.
- nominative: душ
- genitive: душа
So:
- после душа = after the shower / after showering
This is a very common pattern:
- после работы = after work
- после урока = after the lesson
- после фильма = after the film