Ansiedad translates directly to "anxiety." It's a strong, evocative word that perfectly encapsulates the emotional core of the song.
Paty Cantú uses this word to describe the intense, restless longing and emotional turmoil experienced in a complicated, on-again, off-again relationship. The word isn't just a feeling; it's the central theme, representing the constant push and pull of emotions and the uncertainty that defines the connection.
Paty Cantú built "Ansiedad" around a very specific hour: 1 a.m., phone in hand, unable to leave someone alone. "Te escribo a la una, '¿cómo estás?'" ["I text you at one, 'how are you?'"] opens the chorus, and she admits right away it's a bad habit — "Yo sé que está mal" ["I know it's wrong"] — but the night makes the pull stronger than the guilt: "Pero es que de noche cuesta más" ["But at night it's harder"].
The verses trace the contradiction that gives the song its title: "Cuando llegaste yo sabía que te irías algún día, cuando te fuiste yo sabía que te ibas a quedar" ["When you arrived, I knew you'd leave someday, when you left, I knew you'd stay"] — a person who's gone can still occupy every room, every "sillón" and "cama" ["couch" and "bed"]. By the bridge she's flipped the question back on him — "Si estás con otra es cuando siento que tú sientes que me amas" ["When you're with someone else is when I feel that you feel you love me"] — naming the messy, backwards logic of missing someone you know isn't good for you, and asking, plainly, "¿Me extrañas así?" ["Do you miss me the way I miss you?"].