Learn Spanish (Latin America): Siempre me lavo la cara.

Me is a reflexive pronoun. In Spanish, when you perform an action on yourself, you use a reflexive verb. Since you are washing your own face, you use me lavo (literally I wash myself) instead of just lavo (which would mean you are washing something else, like a car or the dishes).

Why does it say la cara (the face) instead of mi cara (my face)?

In English, we use possessive words with body parts. In Spanish, when you use a reflexive verb like me lavo, the me already makes it obvious whose face is being washed. Because of this, Spanish speakers just use the definite article la (the) instead of a possessive word like mi.

Do I need to include yo (I) to show who is washing their face?

No, it is not required. The -o ending in lavo already tells us that I am the one doing the washing. You could say Yo siempre me lavo la cara, but Spanish speakers usually drop the yo unless they want to add special emphasis.

Could I put siempre somewhere else in the sentence?