How do you say in the shower in spanish?

Answer 1

Necesitas bañarte/una ducha

Answer 2

It depends on what you are trying to say.

If you are telling someone that they need to take a shower (presumably because they are sweaty/disgusting and they need to clean up), you should say:

Formal: Necesita Ud. tomar una ducha. --OR-- Necesita Ud. ducharse.

Informal: Necesitas tomar una ducha. --OR-- Necesitas ducharte.

If you are telling someone that they must physically enter the shower stall (presumably because a lover is already inside or there is something placed there), you should say:

Formal: Necesita Ud. entrar la ducha.

Informal: Necesitas entrar la ducha.