A number of verbs in Spanish are reflexive, and are always used with a reflexive pronoun. The pronoun form corresponds to, or reflects, the subject (the person doing the action), and immediately precedes the conjugated verb.
 

The rules about the placement of reflexive pronouns are the same as the rules you have learned about the placement of indirect object pronouns.

Examples of Reflexive Pronouns

• ¿Hace cuánto tiempo que se siente mal?
• Trate de descansar, y sobre todo, no se preocupe. Se le pasará pronto.