Desvelo is a powerful word that literally means "sleeplessness" or the state of being awake. It comes from the verb desvelarse (to stay up all night).
In the song's opening line, Becky G sings, "Me desvelo y vivo apasionada," which means "I lose sleep and live passionately." This one word perfectly captures the all-consuming nature of a love so intense that it disrupts even the most basic need for rest, painting a vivid picture of lovesick obsession.
This song is about a love that has left nothing but pain. Becky G sings about how this one relationship has completely wrecked her. She says it has left a permanent "amargo dolor" (bitter pain) in her life. The feeling is so intense that she wishes her life would end, singing, "Esta vida es mejor que se acabe / No es para mí" (This life is better if it ends / It's not for me).
She uses some really strong images to describe her suffering. Her chest physically hurts, and she claims to have cried "gotitas de sangre del corazón" (little drops of blood from the heart). It's a song that doesn't hold back on the drama of a broken heart, showing how a person can be left with a wounded soul and no compassion from the one who left.