An expert at a specific kind of healing practice is called a therapist. A massage therapist is trained to soothe sore muscles, for example.
The first thing many people think of when they see the word therapist is a psychotherapist, a mental health practitioner whose job is to diagnose and treat psychiatric conditions. This kind of therapist might listen to a patient's thoughts, fears, problems, and dreams and offer helpful techniques or even medication. Other types of therapists include physical therapists and occupational therapists, both of whom help clients with mobility and quality of life issues presented by their physical disabilities or challenges.