This is a regular verb. It follows the conjugation pattern of the verb hablar.
PresentPresente
Me lavo las manos antes de comer.
I wash my hands before eating.
PreteritePretérito indefinido
Se lavó el pelo anoche.
She washed her hair last night.
ImperativeImperativo afirmativo
Lávate la cara antes de salir.
Wash your face before going out.