That evening, at sunset, they brought to him all who were sick or possessed with demons. And the whole city was gathered around the door. And he cured many who were sick with various diseases, and cast out many demons; and he would not permit the demons to speak, because they knew him. (Mark 1: 32-34)

Mark identifies two different categories of illness to which Jesus attends: the sick and the demon-possessed.

The Greek translated as sick is echo. This is the word from which the English echo is derived. The Greeks also used it to mean a reverberation of sound. But for them it was used more broadly to mean holding on, persisting, or not letting go.

I would be a healthier and happier person if I was better able to let go of long-past hurts and errors. This is a disease for which I need healing.

Echo was the name of a minor Greek god. In the myths she was beautiful, but a fount of destructive gossp and distracting babble. She was the ancient equivalent of a Valley Girl or the beautiful bimbo. (See more on the goddess Echo)

There are both internal and external distractions. Each can separate us from God's love and our potential to do God's will. Jesus was sent to restore us to a full relationship with God.