In the primary repression phase, 'it is highly probable that the immediate precipitating causes of primal repressions are quantitative factors such as...the earliest outbreaks of anxiety, which are of a very intense kind'.
1 A psychiatrist treats mood disorders, such as anxiety and depression, which can contribute to sleep problems. Psychiatrists may conduct therapy and prescribe medication to relieve symptoms.  A psychologist provides psychotherapy to treat mood disorders that can interfere with sleep.
A neurologist is a medical doctor who treats diseases of the nervous system. This includes disorders of the brain, spinal cord, nerves, and muscles. Dr. Nicholas D Suite, Neurology, answered on behalf of MDLIVE. A neurologist is a medical doctor who looks after patients with problems involving the brain, spinal cord, nerves, and muscles.